42721692 has 24 divisors (see below), whose sum is σ = 107352336. Its totient is φ = 13145088.

The previous prime is 42721681. The next prime is 42721711. The reversal of 42721692 is 29612724.

42721692 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136773 + ... + 137084.

It is an arithmetic number, because the mean of its divisors is an integer number (4473014).

Almost surely, 2^42721692 is an apocalyptic number.

It is an amenable number.

42721692 is an abundant number, since it is smaller than the sum of its proper divisors (64630644).

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

42721692 is a wasteful number, since it uses less digits than its factorization.

42721692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273877 (or 273875 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 42721692 is about 6536.1832899636. The cubic root of 42721692 is about 349.5823371660.

The spelling of 42721692 in words is "forty-two million, seven hundred twenty-one thousand, six hundred ninety-two".