42690285 has 24 divisors (see below), whose sum is σ = 80724384. Its totient is φ = 20698080.

The previous prime is 42690259. The next prime is 42690287. The reversal of 42690285 is 58209624.

It is a happy number.

It is not a de Polignac number, because 42690285 - 2⁵ = 42690253 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42690287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42627 + ... + 43616.

It is an arithmetic number, because the mean of its divisors is an integer number (3363516).

Almost surely, 2^42690285 is an apocalyptic number.

42690285 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42690285 is a deficient number, since it is larger than the sum of its proper divisors (38034099).

42690285 is a wasteful number, since it uses less digits than its factorization.

42690285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86265 (or 86262 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 42690285 is about 6533.7802993367. The cubic root of 42690285 is about 349.4966506092.

The spelling of 42690285 in words is "forty-two million, six hundred ninety thousand, two hundred eighty-five".