1265132461 has 4 divisors (see below), whose sum is σ = 1331718400. Its totient is φ = 1198546524.

The previous prime is 1265132459. The next prime is 1265132467. The reversal of 1265132461 is 1642315621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1642315621 = 23 ⋅71405027.

It is not a de Polignac number, because 1265132461 - 2¹ = 1265132459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265132467) 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, 33292941 + ... + 33292978.

It is an arithmetic number, because the mean of its divisors is an integer number (332929600).

Almost surely, 2^1265132461 is an apocalyptic number.

It is an amenable number.

1265132461 is a deficient number, since it is larger than the sum of its proper divisors (66585939).

1265132461 is an equidigital number, since it uses as much as digits as its factorization.

1265132461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66585938.

The product of its digits is 8640, while the sum is 31.

The square root of 1265132461 is about 35568.7005807072. The cubic root of 1265132461 is about 1081.5468406775.

The spelling of 1265132461 in words is "one billion, two hundred sixty-five million, one hundred thirty-two thousand, four hundred sixty-one".