1264540 has 24 divisors (see below), whose sum is σ = 2772000. Its totient is φ = 483648.

The previous prime is 1264537. The next prime is 1264541. The reversal of 1264540 is 454621.

It is a super-2 number, since 2×1264540² = 3198122823200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 915 + ... + 1834.

It is an arithmetic number, because the mean of its divisors is an integer number (115500).

2^1264540 is an apocalyptic number.

1264540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264540 is an abundant number, since it is smaller than the sum of its proper divisors (1507460).

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

1264540 is a wasteful number, since it uses less digits than its factorization.

1264540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781 (or 2779 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1264540 is about 1124.5176743831. The cubic root of 1264540 is about 108.1377985006.

The spelling of 1264540 in words is "one million, two hundred sixty-four thousand, five hundred forty".