42399247 has 24 divisors (see below), whose sum is σ = 49507920. Its totient is φ = 36220800.

The previous prime is 42399239. The next prime is 42399251. The reversal of 42399247 is 74299324.

It is not a de Polignac number, because 42399247 - 2³ = 42399239 is a prime.

It is a super-2 number, since 2×42399247² = 3595392292334018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42399257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150747 + ... + 151027.

It is an arithmetic number, because the mean of its divisors is an integer number (2062830).

Almost surely, 2^42399247 is an apocalyptic number.

42399247 is a deficient number, since it is larger than the sum of its proper divisors (7108673).

42399247 is a wasteful number, since it uses less digits than its factorization.

42399247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 364 counting only the distinct ones).

The product of its digits is 108864, while the sum is 40.

The square root of 42399247 is about 6511.4704176553. The cubic root of 42399247 is about 348.7006159867.

The spelling of 42399247 in words is "forty-two million, three hundred ninety-nine thousand, two hundred forty-seven".