1309537025 has 12 divisors (see below), whose sum is σ = 1625824512. Its totient is φ = 1046340240.

The previous prime is 1309537001. The next prime is 1309537027. The reversal of 1309537025 is 5207359031.

It is a happy number.

It is not a de Polignac number, because 1309537025 - 2⁶ = 1309536961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1309537027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11249 + ... + 52398.

It is an arithmetic number, because the mean of its divisors is an integer number (135485376).

Almost surely, 2^1309537025 is an apocalyptic number.

It is an amenable number.

1309537025 is a deficient number, since it is larger than the sum of its proper divisors (316287487).

1309537025 is an equidigital number, since it uses as much as digits as its factorization.

1309537025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64480 (or 64475 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 35.

The square root of 1309537025 is about 36187.5258203708. The cubic root of 1309537025 is about 1094.0552654320.

The spelling of 1309537025 in words is "one billion, three hundred nine million, five hundred thirty-seven thousand, twenty-five".