42139572 has 24 divisors (see below), whose sum is σ = 98522592. Its totient is φ = 14018400.

The previous prime is 42139561. The next prime is 42139577. The reversal of 42139572 is 27593124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42139577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3247 + ... + 9737.

It is an arithmetic number, because the mean of its divisors is an integer number (4105108).

Almost surely, 2^42139572 is an apocalyptic number.

It is a pronic number, being equal to 6491×6492.

It is an amenable number.

42139572 is an abundant number, since it is smaller than the sum of its proper divisors (56383020).

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

42139572 is a wasteful number, since it uses less digits than its factorization.

42139572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7039 (or 7037 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 42139572 is about 6491.4999807440. The cubic root of 42139572 is about 347.9872831923.

It can be divided in two parts, 421 and 39572, that added together give a palindrome (39993).

The spelling of 42139572 in words is "forty-two million, one hundred thirty-nine thousand, five hundred seventy-two".