1272864 has 24 divisors (see below), whose sum is σ = 3341520. Its totient is φ = 424256.

The previous prime is 1272863. The next prime is 1272881. The reversal of 1272864 is 4682721.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (1272863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6534 + ... + 6725.

It is an arithmetic number, because the mean of its divisors is an integer number (139230).

2^1272864 is an apocalyptic number.

It is an amenable number.

1272864 is an abundant number, since it is smaller than the sum of its proper divisors (2068656).

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

1272864 is a wasteful number, since it uses less digits than its factorization.

1272864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13272 (or 13264 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 1272864 is about 1128.2127458950. The cubic root of 1272864 is about 108.3745568295.

The spelling of 1272864 in words is "one million, two hundred seventy-two thousand, eight hundred sixty-four".