1272274465 has 48 divisors (see below), whose sum is σ = 1957334400. Its totient is φ = 792976800.

The previous prime is 1272274453. The next prime is 1272274469. The reversal of 1272274465 is 5644722721.

It is not a de Polignac number, because 1272274465 - 2⁵ = 1272274433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1272274469) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 204450 + ... + 210580.

It is an arithmetic number, because the mean of its divisors is an integer number (40777800).

Almost surely, 2^1272274465 is an apocalyptic number.

It is an amenable number.

1272274465 is a deficient number, since it is larger than the sum of its proper divisors (685059935).

1272274465 is an equidigital number, since it uses as much as digits as its factorization.

1272274465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6179 (or 6154 counting only the distinct ones).

The product of its digits is 188160, while the sum is 40.

The square root of 1272274465 is about 35668.9566009436. The cubic root of 1272274465 is about 1083.5782279231.

The spelling of 1272274465 in words is "one billion, two hundred seventy-two million, two hundred seventy-four thousand, four hundred sixty-five".