1264641 has 16 divisors (see below), whose sum is σ = 1968000. Its totient is φ = 722064.

The previous prime is 1264607. The next prime is 1264643. The reversal of 1264641 is 1464621.

It is not a de Polignac number, because 1264641 - 2⁶ = 1264577 is a prime.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

1264641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1264643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415 + ... + 1643.

It is an arithmetic number, because the mean of its divisors is an integer number (123000).

2^1264641 is an apocalyptic number.

It is an amenable number.

1264641 is a deficient number, since it is larger than the sum of its proper divisors (703359).

1264641 is an equidigital number, since it uses as much as digits as its factorization.

1264641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253 (or 1239 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 1264641 is about 1124.5625816290. The cubic root of 1264641 is about 108.1406774465.

The spelling of 1264641 in words is "one million, two hundred sixty-four thousand, six hundred forty-one".