692421021 has 16 divisors (see below), whose sum is σ = 1030417920. Its totient is φ = 459540000.

The previous prime is 692421013. The next prime is 692421073. The reversal of 692421021 is 120124296.

It is not a de Polignac number, because 692421021 - 2³ = 692421013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (692421721) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 51480 + ... + 63521.

It is an arithmetic number, because the mean of its divisors is an integer number (64401120).

Almost surely, 2^692421021 is an apocalyptic number.

It is an amenable number.

692421021 is a deficient number, since it is larger than the sum of its proper divisors (337996899).

692421021 is a wasteful number, since it uses less digits than its factorization.

692421021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115233 (or 115227 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 692421021 is about 26313.8940675834. The cubic root of 692421021 is about 884.6878876423.

The spelling of 692421021 in words is "six hundred ninety-two million, four hundred twenty-one thousand, twenty-one".