129245474 has 4 divisors (see below), whose sum is σ = 193868214. Its totient is φ = 64622736.

The previous prime is 129245453. The next prime is 129245497. The reversal of 129245474 is 474542921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 474542921 = 29 ⋅16363549.

It can be written as a sum of positive squares in only one way, i.e., 82937449 + 46308025 = 9107^2 + 6805^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32311367 + ... + 32311370.

Almost surely, 2^129245474 is an apocalyptic number.

129245474 is a deficient number, since it is larger than the sum of its proper divisors (64622740).

129245474 is an equidigital number, since it uses as much as digits as its factorization.

129245474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64622739.

The product of its digits is 80640, while the sum is 38.

The square root of 129245474 is about 11368.6179459071. The cubic root of 129245474 is about 505.5977289904.

The spelling of 129245474 in words is "one hundred twenty-nine million, two hundred forty-five thousand, four hundred seventy-four".