42402345 has 16 divisors (see below), whose sum is σ = 67977792. Its totient is φ = 22569920.

The previous prime is 42402307. The next prime is 42402377. The reversal of 42402345 is 54320424.

It is not a de Polignac number, because 42402345 - 2¹⁰ = 42401321 is a prime.

It is a super-2 number, since 2×42402345² = 3595917722998050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5935 + ... + 10955.

It is an arithmetic number, because the mean of its divisors is an integer number (4248612).

Almost surely, 2^42402345 is an apocalyptic number.

It is an amenable number.

42402345 is a deficient number, since it is larger than the sum of its proper divisors (25575447).

42402345 is a wasteful number, since it uses less digits than its factorization.

42402345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5592.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 42402345 is about 6511.7083012064. The cubic root of 42402345 is about 348.7091086548.

Adding to 42402345 its reverse (54320424), we get a palindrome (96722769).

The spelling of 42402345 in words is "forty-two million, four hundred two thousand, three hundred forty-five".