1272262465 has 4 divisors (see below), whose sum is σ = 1526714964. Its totient is φ = 1017809968.

The previous prime is 1272262423. The next prime is 1272262471. The reversal of 1272262465 is 5642622721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5642622721 = 43933 ⋅128437.

It can be written as a sum of positive squares in 2 ways, for example, as 747256896 + 525005569 = 27336^2 + 22913^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272262465 - 2¹¹ = 1272260417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127226242 + ... + 127226251.

It is an arithmetic number, because the mean of its divisors is an integer number (381678741).

Almost surely, 2^1272262465 is an apocalyptic number.

It is an amenable number.

1272262465 is a deficient number, since it is larger than the sum of its proper divisors (254452499).

1272262465 is an equidigital number, since it uses as much as digits as its factorization.

1272262465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254452498.

The product of its digits is 80640, while the sum is 37.

The square root of 1272262465 is about 35668.7883870479. The cubic root of 1272262465 is about 1083.5748211688.

The spelling of 1272262465 in words is "one billion, two hundred seventy-two million, two hundred sixty-two thousand, four hundred sixty-five".