129457672 has 16 divisors (see below), whose sum is σ = 249294060. Its totient is φ = 62979264.

The previous prime is 129457661. The next prime is 129457721. The reversal of 129457672 is 276754921.

It can be written as a sum of positive squares in 2 ways, for example, as 128278276 + 1179396 = 11326^2 + 1086^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218383 + ... + 218974.

Almost surely, 2^129457672 is an apocalyptic number.

It is an amenable number.

129457672 is a deficient number, since it is larger than the sum of its proper divisors (119836388).

129457672 is a wasteful number, since it uses less digits than its factorization.

129457672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437400 (or 437396 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 129457672 is about 11377.9467391968. The cubic root of 129457672 is about 505.8742781074.

The spelling of 129457672 in words is "one hundred twenty-nine million, four hundred fifty-seven thousand, six hundred seventy-two".