42786285 has 16 divisors (see below), whose sum is σ = 68953920. Its totient is φ = 22654080.

The previous prime is 42786277. The next prime is 42786301. The reversal of 42786285 is 58268724.

It is a happy number.

It is not a de Polignac number, because 42786285 - 2³ = 42786277 is a prime.

It is a congruent number.

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, 8176 + ... + 12345.

It is an arithmetic number, because the mean of its divisors is an integer number (4309620).

Almost surely, 2^42786285 is an apocalyptic number.

It is an amenable number.

42786285 is a deficient number, since it is larger than the sum of its proper divisors (26167635).

42786285 is a wasteful number, since it uses less digits than its factorization.

42786285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20668.

The product of its digits is 215040, while the sum is 42.

The square root of 42786285 is about 6541.1226100724. The cubic root of 42786285 is about 349.7584319489.

It can be divided in two parts, 42786 and 285, that added together give a triangular number (43071 = T₂₉₃).

The spelling of 42786285 in words is "forty-two million, seven hundred eighty-six thousand, two hundred eighty-five".