1255000040 has 64 divisors (see below), whose sum is σ = 3314390400. Its totient is φ = 418652928.

The previous prime is 1255000009. The next prime is 1255000049. The reversal of 1255000040 is 400005521.

It is a junction number, because it is equal to n+sod(n) for n = 1254999982 and 1255000018.

It is not an unprimeable number, because it can be changed into a prime (1255000049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50210 + ... + 70929.

It is an arithmetic number, because the mean of its divisors is an integer number (51787350).

Almost surely, 2^1255000040 is an apocalyptic number.

1255000040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255000040 is an abundant number, since it is smaller than the sum of its proper divisors (2059390360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1255000040 is a wasteful number, since it uses less digits than its factorization.

1255000040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121194 (or 121190 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 1255000040 is about 35425.9797323941. The cubic root of 1255000040 is about 1078.6517354604.

Adding to 1255000040 its reverse (400005521), we get a palindrome (1655005561).

The spelling of 1255000040 in words is "one billion, two hundred fifty-five million, forty", and thus it is an aban number.