42242655 has 48 divisors (see below), whose sum is σ = 84690144. Its totient is φ = 17821440.

The previous prime is 42242639. The next prime is 42242659. The reversal of 42242655 is 55624224.

It is a happy number.

It is not a de Polignac number, because 42242655 - 2⁴ = 42242639 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42242659) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7345 + ... + 11765.

It is an arithmetic number, because the mean of its divisors is an integer number (1764378).

Almost surely, 2^42242655 is an apocalyptic number.

42242655 is an abundant number, since it is smaller than the sum of its proper divisors (42447489).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42242655 is a wasteful number, since it uses less digits than its factorization.

42242655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4456 (or 4449 counting only the distinct ones).

The product of its digits is 19200, while the sum is 30.

The square root of 42242655 is about 6499.4349754421. The cubic root of 42242655 is about 348.2708042082.

Subtracting from 42242655 its product of digits (19200), we obtain a triangular number (42223455 = T₉₁₈₉).

Adding to 42242655 its reverse (55624224), we get a palindrome (97866879).

The spelling of 42242655 in words is "forty-two million, two hundred forty-two thousand, six hundred fifty-five".