1271264 has 12 divisors (see below), whose sum is σ = 2502864. Its totient is φ = 635616.

The previous prime is 1271251. The next prime is 1271293. The reversal of 1271264 is 4621721.

It is a super-2 number, since 2×1271264² = 3232224315392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19832 + ... + 19895.

It is an arithmetic number, because the mean of its divisors is an integer number (208572).

2^1271264 is an apocalyptic number.

It is an amenable number.

1271264 is a deficient number, since it is larger than the sum of its proper divisors (1231600).

1271264 is an equidigital number, since it uses as much as digits as its factorization.

1271264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39737 (or 39729 counting only the distinct ones).

The product of its digits is 672, while the sum is 23.

The square root of 1271264 is about 1127.5034368019. The cubic root of 1271264 is about 108.3291285679.

Adding to 1271264 its reverse (4621721), we get a palindrome (5892985).

The spelling of 1271264 in words is "one million, two hundred seventy-one thousand, two hundred sixty-four".