1246640 has 20 divisors (see below), whose sum is σ = 2898624. Its totient is φ = 498624.

The previous prime is 1246639. The next prime is 1246667. The reversal of 1246640 is 466421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1246640² = 3108222579200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7712 + ... + 7871.

2^1246640 is an apocalyptic number.

1246640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1246640 is an abundant number, since it is smaller than the sum of its proper divisors (1651984).

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

1246640 is a wasteful number, since it uses less digits than its factorization.

1246640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15596 (or 15590 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1246640 is about 1116.5303399371. The cubic root of 1246640 is about 107.6251292174.

The spelling of 1246640 in words is "one million, two hundred forty-six thousand, six hundred forty".