1048764721 has 6 divisors (see below), whose sum is σ = 1071555890. Its totient is φ = 1026448416.

The previous prime is 1048764713. The next prime is 1048764733. The reversal of 1048764721 is 1274678401.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 581340321 + 467424400 = 24111^2 + 21620^2 .

It is not a de Polignac number, because 1048764721 - 2³ = 1048764713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1048764701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 235176 + ... + 239593.

Almost surely, 2^1048764721 is an apocalyptic number.

It is an amenable number.

1048764721 is a deficient number, since it is larger than the sum of its proper divisors (22791169).

1048764721 is an frugal number, since it uses more digits than its factorization.

1048764721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474863 (or 474816 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 1048764721 is about 32384.6371139156. The cubic root of 1048764721 is about 1015.9976184792.

The spelling of 1048764721 in words is "one billion, forty-eight million, seven hundred sixty-four thousand, seven hundred twenty-one".