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1681429 = 4339103
BaseRepresentation
bin110011010100000010101
310011102111011
412122200111
5412301204
6100012221
720202061
oct6324025
93142434
101681429
11a49312
12691071
1346b439
1431aaa1
15233304
hex19a815

1681429 has 4 divisors (see below), whose sum is σ = 1720576. Its totient is φ = 1642284.

The previous prime is 1681423. The next prime is 1681469. The reversal of 1681429 is 9241861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1681429 - 25 = 1681397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1681429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19509 + ... + 19594.

It is an arithmetic number, because the mean of its divisors is an integer number (430144).

21681429 is an apocalyptic number.

It is an amenable number.

1681429 is a deficient number, since it is larger than the sum of its proper divisors (39147).

1681429 is an equidigital number, since it uses as much as digits as its factorization.

1681429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39146.

The product of its digits is 3456, while the sum is 31.

The square root of 1681429 is about 1296.6992712268. The cubic root of 1681429 is about 118.9121353145.

The spelling of 1681429 in words is "one million, six hundred eighty-one thousand, four hundred twenty-nine".

Divisors: 1 43 39103 1681429