1055720725 has 6 divisors (see below), whose sum is σ = 1309093730. Its totient is φ = 844576560.

The previous prime is 1055720681. The next prime is 1055720737. The reversal of 1055720725 is 5270275501.

It can be written as a sum of positive squares in 3 ways, for example, as 217444516 + 838276209 = 14746^2 + 28953^2 .

It is not a de Polignac number, because 1055720725 - 2⁷ = 1055720597 is a prime.

It is a super-2 number, since 2×1055720725² = 2229092498389051250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21114390 + ... + 21114439.

Almost surely, 2^1055720725 is an apocalyptic number.

It is an amenable number.

1055720725 is a deficient number, since it is larger than the sum of its proper divisors (253373005).

1055720725 is an equidigital number, since it uses as much as digits as its factorization.

1055720725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42228839 (or 42228834 counting only the distinct ones).

The product of its (nonzero) digits is 24500, while the sum is 34.

The square root of 1055720725 is about 32491.8562873838. The cubic root of 1055720725 is about 1018.2388952656.

The spelling of 1055720725 in words is "one billion, fifty-five million, seven hundred twenty thousand, seven hundred twenty-five".