1022747725 has 6 divisors (see below), whose sum is σ = 1268207210. Its totient is φ = 818198160.

The previous prime is 1022747717. The next prime is 1022747729. The reversal of 1022747725 is 5277472201.

It can be written as a sum of positive squares in 3 ways, for example, as 11634921 + 1011112804 = 3411^2 + 31798^2 .

It is not a de Polignac number, because 1022747725 - 2³ = 1022747717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022747729) 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, 20454930 + ... + 20454979.

Almost surely, 2^1022747725 is an apocalyptic number.

It is an amenable number.

1022747725 is a deficient number, since it is larger than the sum of its proper divisors (245459485).

1022747725 is an equidigital number, since it uses as much as digits as its factorization.

1022747725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40909919 (or 40909914 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 37.

The square root of 1022747725 is about 31980.4272172840. The cubic root of 1022747725 is about 1007.5257953238.

The spelling of 1022747725 in words is "one billion, twenty-two million, seven hundred forty-seven thousand, seven hundred twenty-five".