42351399 has 24 divisors (see below), whose sum is σ = 65622960. Its totient is φ = 26237952.

The previous prime is 42351391. The next prime is 42351427. The reversal of 42351399 is 99315324.

It is a happy number.

42351399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42351399 - 2³ = 42351391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42351391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6727 + ... + 11399.

It is an arithmetic number, because the mean of its divisors is an integer number (2734290).

Almost surely, 2^42351399 is an apocalyptic number.

42351399 is a deficient number, since it is larger than the sum of its proper divisors (23271561).

42351399 is a wasteful number, since it uses less digits than its factorization.

42351399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4751 (or 4748 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 42351399 is about 6507.7952487767. The cubic root of 42351399 is about 348.5693958319.

The spelling of 42351399 in words is "forty-two million, three hundred fifty-one thousand, three hundred ninety-nine".