1295815537 has 4 divisors (see below), whose sum is σ = 1327420836. Its totient is φ = 1264210240.

The previous prime is 1295815513. The next prime is 1295815541. The reversal of 1295815537 is 7355185921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 170145936 + 1125669601 = 13044^2 + 33551^2 .

It is a cyclic number.

It is not a de Polignac number, because 1295815537 - 2¹¹ = 1295813489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1295815567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15802588 + ... + 15802669.

It is an arithmetic number, because the mean of its divisors is an integer number (331855209).

Almost surely, 2^1295815537 is an apocalyptic number.

It is an amenable number.

1295815537 is a deficient number, since it is larger than the sum of its proper divisors (31605299).

1295815537 is an equidigital number, since it uses as much as digits as its factorization.

1295815537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31605298.

The product of its digits is 378000, while the sum is 46.

The square root of 1295815537 is about 35997.4379227189. The cubic root of 1295815537 is about 1090.2206261592.

The spelling of 1295815537 in words is "one billion, two hundred ninety-five million, eight hundred fifteen thousand, five hundred thirty-seven".