1381237225 has 9 divisors (see below), whose sum is σ = 1712964613. Its totient is φ = 1104841120.

The previous prime is 1381237183. The next prime is 1381237229. The reversal of 1381237225 is 5227321831.

The square root of 1381237225 is 37165.

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 546951769 + 834285456 = 23387^2 + 28884^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1381237225 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381237229) 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, 182109 + ... + 189541.

Almost surely, 2^1381237225 is an apocalyptic number.

1381237225 is the 37165-th square number.

1381237225 is the 18583-rd centered octagonal number.

It is an amenable number.

1381237225 is a deficient number, since it is larger than the sum of its proper divisors (331727388).

1381237225 is an frugal number, since it uses more digits than its factorization.

1381237225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14876 (or 7438 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The cubic root of 1381237225 is about 1113.6688989220.

The spelling of 1381237225 in words is "one billion, three hundred eighty-one million, two hundred thirty-seven thousand, two hundred twenty-five".