42399371 has 16 divisors (see below), whose sum is σ = 49925568. Its totient is φ = 35251200.

The previous prime is 42399361. The next prime is 42399389. The reversal of 42399371 is 17399324.

It is a cyclic number.

It is not a de Polignac number, because 42399371 - 2⁶ = 42399307 is a prime.

It is a super-2 number, since 2×42399371² = 3595413322391282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42399341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68861 + ... + 69473.

It is an arithmetic number, because the mean of its divisors is an integer number (3120348).

Almost surely, 2^42399371 is an apocalyptic number.

42399371 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

42399371 is a deficient number, since it is larger than the sum of its proper divisors (7526197).

42399371 is a wasteful number, since it uses less digits than its factorization.

42399371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902.

The product of its digits is 40824, while the sum is 38.

The square root of 42399371 is about 6511.4799393072. The cubic root of 42399371 is about 348.7009559207.

The spelling of 42399371 in words is "forty-two million, three hundred ninety-nine thousand, three hundred seventy-one".