42131990 has 8 divisors (see below), whose sum is σ = 75837600. Its totient is φ = 16852792.

The previous prime is 42131989. The next prime is 42132017. The reversal of 42131990 is 9913124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2106590 + ... + 2106609.

It is an arithmetic number, because the mean of its divisors is an integer number (9479700).

Almost surely, 2^42131990 is an apocalyptic number.

42131990 is a deficient number, since it is larger than the sum of its proper divisors (33705610).

42131990 is a wasteful number, since it uses less digits than its factorization.

42131990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4213206.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 42131990 is about 6490.9159600167. The cubic root of 42131990 is about 347.9664112999.

The spelling of 42131990 in words is "forty-two million, one hundred thirty-one thousand, nine hundred ninety".