1261315465 has 16 divisors (see below), whose sum is σ = 1556584128. Its totient is φ = 980739136.

The previous prime is 1261315403. The next prime is 1261315519. The reversal of 1261315465 is 5645131621.

It is a de Polignac number, because none of the positive numbers 2^k-1261315465 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1261315465.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6114 + ... + 50596.

It is an arithmetic number, because the mean of its divisors is an integer number (97286508).

Almost surely, 2^1261315465 is an apocalyptic number.

It is an amenable number.

1261315465 is a deficient number, since it is larger than the sum of its proper divisors (295268663).

1261315465 is a wasteful number, since it uses less digits than its factorization.

1261315465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44648.

The product of its digits is 21600, while the sum is 34.

The square root of 1261315465 is about 35515.0033788538. The cubic root of 1261315465 is about 1080.4580433070.

The spelling of 1261315465 in words is "one billion, two hundred sixty-one million, three hundred fifteen thousand, four hundred sixty-five".