42390556 has 48 divisors (see below), whose sum is σ = 83472480. Its totient is φ = 18708480.

The previous prime is 42390553. The next prime is 42390559. The reversal of 42390556 is 65509324.

It is an interprime number because it is at equal distance from previous prime (42390553) and next prime (42390559).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42390553) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 125620 + ... + 125956.

It is an arithmetic number, because the mean of its divisors is an integer number (1739010).

Almost surely, 2^42390556 is an apocalyptic number.

It is an amenable number.

42390556 is a deficient number, since it is larger than the sum of its proper divisors (41081924).

42390556 is a wasteful number, since it uses less digits than its factorization.

42390556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 42390556 is about 6510.8030226693. The cubic root of 42390556 is about 348.6767888014.

The spelling of 42390556 in words is "forty-two million, three hundred ninety thousand, five hundred fifty-six".