1264690 has 48 divisors (see below), whose sum is σ = 2770200. Its totient is φ = 413952.

The previous prime is 1264687. The next prime is 1264699. The reversal of 1264690 is 964621.

It can be written as a sum of positive squares in 4 ways, for example, as 840889 + 423801 = 917^2 + 651^2 .

It is a super-2 number, since 2×1264690² = 3198881592200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1264699) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14166 + ... + 14254.

2^1264690 is an apocalyptic number.

1264690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1264690 is an abundant number, since it is smaller than the sum of its proper divisors (1505510).

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

1264690 is a wasteful number, since it uses less digits than its factorization.

1264690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1264690 is about 1124.5843676666. The cubic root of 1264690 is about 108.1420741077.

The spelling of 1264690 in words is "one million, two hundred sixty-four thousand, six hundred ninety".