42261687 has 12 divisors (see below), whose sum is σ = 65740584. Its totient is φ = 26007120.

The previous prime is 42261679. The next prime is 42261689. The reversal of 42261687 is 78616224.

It is not a de Polignac number, because 42261687 - 2³ = 42261679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42261689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180489 + ... + 180722.

It is an arithmetic number, because the mean of its divisors is an integer number (5478382).

Almost surely, 2^42261687 is an apocalyptic number.

42261687 is a deficient number, since it is larger than the sum of its proper divisors (23478897).

42261687 is a wasteful number, since it uses less digits than its factorization.

42261687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361230 (or 361227 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 42261687 is about 6500.8989378393. The cubic root of 42261687 is about 348.3230996487.

The spelling of 42261687 in words is "forty-two million, two hundred sixty-one thousand, six hundred eighty-seven".