129057974 has 4 divisors (see below), whose sum is σ = 193586964. Its totient is φ = 64528986.

The previous prime is 129057959. The next prime is 129057979. The reversal of 129057974 is 479750921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 479750921 = 13 ⋅36903917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129057979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32264492 + ... + 32264495.

It is an arithmetic number, because the mean of its divisors is an integer number (48396741).

Almost surely, 2^129057974 is an apocalyptic number.

129057974 is a deficient number, since it is larger than the sum of its proper divisors (64528990).

129057974 is an equidigital number, since it uses as much as digits as its factorization.

129057974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64528989.

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 129057974 is about 11360.3685679647. The cubic root of 129057974 is about 505.3531157723.

It can be divided in two parts, 129057 and 974, that added together give a palindrome (130031).

The spelling of 129057974 in words is "one hundred twenty-nine million, fifty-seven thousand, nine hundred seventy-four".