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1253140389 = 3415470869
BaseRepresentation
bin100101010110001…
…0110011110100101
310020100000010110000
41022230112132211
510031300443024
6324203051513
743024342344
oct11254263645
93210003400
101253140389
11593401a16
122ab810b99
1316c80c0b7
14bc603b5b
1575035cc9
hex4ab167a5

1253140389 has 10 divisors (see below), whose sum is σ = 1871975270. Its totient is φ = 835426872.

The previous prime is 1253140387. The next prime is 1253140403. The reversal of 1253140389 is 9830413521.

1253140389 is a `hidden beast` number, since 1 + 2 + 531 + 40 + 3 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1101111489 + 152028900 = 33183^2 + 12330^2 .

It is not a de Polignac number, because 1253140389 - 21 = 1253140387 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253140387) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7735354 + ... + 7735515.

It is an arithmetic number, because the mean of its divisors is an integer number (187197527).

Almost surely, 21253140389 is an apocalyptic number.

It is an amenable number.

1253140389 is a deficient number, since it is larger than the sum of its proper divisors (618834881).

1253140389 is an equidigital number, since it uses as much as digits as its factorization.

1253140389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15470881 (or 15470872 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1253140389 is about 35399.7230073909. The cubic root of 1253140389 is about 1078.1186923487.

The spelling of 1253140389 in words is "one billion, two hundred fifty-three million, one hundred forty thousand, three hundred eighty-nine".

Divisors: 1 3 9 27 81 15470869 46412607 139237821 417713463 1253140389