1264491 has 20 divisors (see below), whose sum is σ = 1925352. Its totient is φ = 826848.

The previous prime is 1264451. The next prime is 1264499. The reversal of 1264491 is 1944621.

1264491 is a `hidden beast` number, since 12 + 644 + 9 + 1 = 666.

It is not a de Polignac number, because 1264491 - 2⁷ = 1264363 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1264499) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5311 + ... + 5543.

2^1264491 is an apocalyptic number.

1264491 is a deficient number, since it is larger than the sum of its proper divisors (660861).

1264491 is an equidigital number, since it uses as much as digits as its factorization.

1264491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 303 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1264491 is about 1124.4958870534. The cubic root of 1264491 is about 108.1364017290.

The spelling of 1264491 in words is "one million, two hundred sixty-four thousand, four hundred ninety-one".