42012156 has 24 divisors (see below), whose sum is σ = 98267904. Its totient is φ = 13969840.

The previous prime is 42012143. The next prime is 42012163. The reversal of 42012156 is 65121024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1111 + ... + 9233.

It is an arithmetic number, because the mean of its divisors is an integer number (4094496).

Almost surely, 2^42012156 is an apocalyptic number.

It is an amenable number.

42012156 is an abundant number, since it is smaller than the sum of its proper divisors (56255748).

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

42012156 is a wasteful number, since it uses less digits than its factorization.

42012156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8561 (or 8559 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 42012156 is about 6481.6784863182. The cubic root of 42012156 is about 347.6361966347.

The spelling of 42012156 in words is "forty-two million, twelve thousand, one hundred fifty-six".