1050056721 has 18 divisors (see below), whose sum is σ = 1764381762. Its totient is φ = 600032160.

The previous prime is 1050056687. The next prime is 1050056759. The reversal of 1050056721 is 1276500501.

It can be written as a sum of positive squares in only one way, i.e., 1047234321 + 2822400 = 32361^2 + 1680^2 .

It is not a de Polignac number, because 1050056721 - 2¹⁰ = 1050055697 is a prime.

It is a super-2 number, since 2×1050056721² = 2205238234634543682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1050056321) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1190100 + ... + 1190981.

It is an arithmetic number, because the mean of its divisors is an integer number (98021209).

Almost surely, 2^1050056721 is an apocalyptic number.

It is an amenable number.

1050056721 is a deficient number, since it is larger than the sum of its proper divisors (714325041).

1050056721 is a wasteful number, since it uses less digits than its factorization.

1050056721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381101 (or 2381091 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 1050056721 is about 32404.5787042510. The cubic root of 1050056721 is about 1016.4146583957.

The spelling of 1050056721 in words is "one billion, fifty million, fifty-six thousand, seven hundred twenty-one".