42497429 has 8 divisors (see below), whose sum is σ = 45856440. Its totient is φ = 39151296.

The previous prime is 42497417. The next prime is 42497453. The reversal of 42497429 is 92479424.

It can be written as a sum of positive squares in 4 ways, for example, as 3247204 + 39250225 = 1802^2 + 6265^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42497429 - 2²⁴ = 25720213 is a prime.

It is a super-2 number, since 2×42497429² = 3612062943220082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42497479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4307 + ... + 10175.

It is an arithmetic number, because the mean of its divisors is an integer number (5732055).

Almost surely, 2^42497429 is an apocalyptic number.

It is an amenable number.

42497429 is a deficient number, since it is larger than the sum of its proper divisors (3359011).

42497429 is a wasteful number, since it uses less digits than its factorization.

42497429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6439.

The product of its digits is 145152, while the sum is 41.

The square root of 42497429 is about 6519.0052155218. The cubic root of 42497429 is about 348.9695651930.

The spelling of 42497429 in words is "forty-two million, four hundred ninety-seven thousand, four hundred twenty-nine".