61257929 has 4 divisors (see below), whose sum is σ = 62682576. Its totient is φ = 59833284.

The previous prime is 61257913. The next prime is 61257941. The reversal of 61257929 is 92975216.

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 61257929 - 2⁴ = 61257913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61257949) 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, 712259 + ... + 712344.

It is an arithmetic number, because the mean of its divisors is an integer number (15670644).

Almost surely, 2^61257929 is an apocalyptic number.

It is an amenable number.

61257929 is a deficient number, since it is larger than the sum of its proper divisors (1424647).

61257929 is a wasteful number, since it uses less digits than its factorization.

61257929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424646.

The product of its digits is 68040, while the sum is 41.

The square root of 61257929 is about 7826.7444700846. The cubic root of 61257929 is about 394.2037669822.

The spelling of 61257929 in words is "sixty-one million, two hundred fifty-seven thousand, nine hundred twenty-nine".