1272921048 has 64 divisors (see below), whose sum is σ = 4041024000. Its totient is φ = 363691296.

The previous prime is 1272921029. The next prime is 1272921077. The reversal of 1272921048 is 8401292721.

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 15 ways as a sum of consecutive naturals, for example, 419428 + ... + 422451.

It is an arithmetic number, because the mean of its divisors is an integer number (63141000).

Almost surely, 2^1272921048 is an apocalyptic number.

1272921048 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1272921048 is an abundant number, since it is smaller than the sum of its proper divisors (2768102952).

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

1272921048 is a wasteful number, since it uses less digits than its factorization.

1272921048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841901 (or 841891 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1272921048 is about 35678.0191154161. The cubic root of 1272921048 is about 1083.7617587115.

The spelling of 1272921048 in words is "one billion, two hundred seventy-two million, nine hundred twenty-one thousand, forty-eight".