42309524 has 12 divisors (see below), whose sum is σ = 74088000. Its totient is φ = 21141528.

The previous prime is 42309479. The next prime is 42309551. The reversal of 42309524 is 42590324.

It is a super-2 number, since 2×42309524² = 3580191642213152, which contains 22 as substring.

It is a congruent number.

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, 8837 + ... + 12755.

It is an arithmetic number, because the mean of its divisors is an integer number (6174000).

Almost surely, 2^42309524 is an apocalyptic number.

It is an amenable number.

42309524 is a deficient number, since it is larger than the sum of its proper divisors (31778476).

42309524 is a wasteful number, since it uses less digits than its factorization.

42309524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6622 (or 6620 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 42309524 is about 6504.5771576637. The cubic root of 42309524 is about 348.4544751354.

Adding to 42309524 its reverse (42590324), we get a palindrome (84899848).

The spelling of 42309524 in words is "forty-two million, three hundred nine thousand, five hundred twenty-four".