921012860 has 12 divisors (see below), whose sum is σ = 1934127048. Its totient is φ = 368405136.

The previous prime is 921012857. The next prime is 921012863. The reversal of 921012860 is 68210129.

It is an interprime number because it is at equal distance from previous prime (921012857) and next prime (921012863).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921012863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23025302 + ... + 23025341.

It is an arithmetic number, because the mean of its divisors is an integer number (161177254).

Almost surely, 2^921012860 is an apocalyptic number.

It is an amenable number.

921012860 is an abundant number, since it is smaller than the sum of its proper divisors (1013114188).

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

921012860 is a wasteful number, since it uses less digits than its factorization.

921012860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46050652 (or 46050650 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 921012860 is about 30348.1936859511. The cubic root of 921012860 is about 972.9456142734.

Adding to 921012860 its reverse (68210129), we get a palindrome (989222989).

The spelling of 921012860 in words is "nine hundred twenty-one million, twelve thousand, eight hundred sixty".