1273664 has 28 divisors (see below), whose sum is σ = 2889504. Its totient is φ = 545664.

The previous prime is 1273663. The next prime is 1273673. The reversal of 1273664 is 4663721.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974 + ... + 1869.

2^1273664 is an apocalyptic number.

1273664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1273664 is an abundant number, since it is smaller than the sum of its proper divisors (1615840).

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

1273664 is an equidigital number, since it uses as much as digits as its factorization.

1273664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862 (or 2852 counting only the distinct ones).

The product of its digits is 6048, while the sum is 29.

The square root of 1273664 is about 1128.5672332653. The cubic root of 1273664 is about 108.3972566854.

The spelling of 1273664 in words is "one million, two hundred seventy-three thousand, six hundred sixty-four".