42122565 has 32 divisors (see below), whose sum is σ = 76018560. Its totient is φ = 22125312.

The previous prime is 42122537. The next prime is 42122573. The reversal of 42122565 is 56522124.

It is not a de Polignac number, because 42122565 - 2⁸ = 42122309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6717 + ... + 11373.

It is an arithmetic number, because the mean of its divisors is an integer number (2375580).

Almost surely, 2^42122565 is an apocalyptic number.

42122565 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42122565 is a deficient number, since it is larger than the sum of its proper divisors (33895995).

42122565 is a wasteful number, since it uses less digits than its factorization.

42122565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4738 (or 4732 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 42122565 is about 6490.1899047717. The cubic root of 42122565 is about 347.9404624662.

Adding to 42122565 its reverse (56522124), we get a palindrome (98644689).

The spelling of 42122565 in words is "forty-two million, one hundred twenty-two thousand, five hundred sixty-five".