1272262464 has 392 divisors, whose sum is σ = 4304251488. Its totient is φ = 369515520.

The previous prime is 1272262423. The next prime is 1272262471. The reversal of 1272262464 is 4642622721.

1272262464 is a `hidden beast` number, since 1 + 2 + 7 + 22 + 624 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 18988959 + ... + 18989025.

Almost surely, 2^1272262464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272262464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2152125744).

1272262464 is an abundant number, since it is smaller than the sum of its proper divisors (3031989024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1272262464 is an equidigital number, since it uses as much as digits as its factorization.

1272262464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 120 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 1272262464 is about 35668.7883730300. The cubic root of 1272262464 is about 1083.5748208849.

The spelling of 1272262464 in words is "one billion, two hundred seventy-two million, two hundred sixty-two thousand, four hundred sixty-four".