1271560400 has 60 divisors (see below), whose sum is σ = 3332655744. Its totient is φ = 462384000.

The previous prime is 1271560399. The next prime is 1271560417. The reversal of 1271560400 is 40651721.

It is a self number, because there is not a number n which added to its sum of digits gives 1271560400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140096 + ... + 148895.

Almost surely, 2^1271560400 is an apocalyptic number.

1271560400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271560400 is an abundant number, since it is smaller than the sum of its proper divisors (2061095344).

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

1271560400 is a wasteful number, since it uses less digits than its factorization.

1271560400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289020 (or 289009 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1271560400 is about 35658.9455817190. The cubic root of 1271560400 is about 1083.3754702874.

The spelling of 1271560400 in words is "one billion, two hundred seventy-one million, five hundred sixty thousand, four hundred".