42091506 has 24 divisors (see below), whose sum is σ = 91547820. Its totient is φ = 13976736.

The previous prime is 42091493. The next prime is 42091519. The reversal of 42091506 is 60519024.

It is an interprime number because it is at equal distance from previous prime (42091493) and next prime (42091519).

It can be written as a sum of positive squares in 2 ways, for example, as 30902481 + 11189025 = 5559^2 + 3345^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42091506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 496 + ... + 9188.

Almost surely, 2^42091506 is an apocalyptic number.

42091506 is an abundant number, since it is smaller than the sum of its proper divisors (49456314).

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

42091506 is a wasteful number, since it uses less digits than its factorization.

42091506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8970 (or 8967 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 42091506 is about 6487.7966984177. The cubic root of 42091506 is about 347.8549236740.

The spelling of 42091506 in words is "forty-two million, ninety-one thousand, five hundred six".