1015378225 has 9 divisors (see below), whose sum is σ = 1259266593. Its totient is φ = 812175120.

The previous prime is 1015378213. The next prime is 1015378229. The reversal of 1015378225 is 5228735101.

The square root of 1015378225 is 31865.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 45927729 + 969450496 = 6777^2 + 31136^2 .

It is not a de Polignac number, because 1015378225 - 2¹⁷ = 1015247153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1015378229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 156139 + ... + 162511.

Almost surely, 2^1015378225 is an apocalyptic number.

1015378225 is the 31865-th square number.

1015378225 is the 15933-rd centered octagonal number.

It is an amenable number.

1015378225 is a deficient number, since it is larger than the sum of its proper divisors (243888368).

1015378225 is an frugal number, since it uses more digits than its factorization.

1015378225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12756 (or 6378 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The cubic root of 1015378225 is about 1005.1000205726.

The spelling of 1015378225 in words is "one billion, fifteen million, three hundred seventy-eight thousand, two hundred twenty-five".