1290624 has 32 divisors (see below), whose sum is σ = 3429240. Its totient is φ = 430080.

The previous prime is 1290607. The next prime is 1290629. The reversal of 1290624 is 4260921.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1290594 and 1290603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290629) 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, 1297 + ... + 2064.

2^1290624 is an apocalyptic number.

It is an amenable number.

1290624 is an abundant number, since it is smaller than the sum of its proper divisors (2138616).

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

1290624 is an equidigital number, since it uses as much as digits as its factorization.

1290624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378 (or 3366 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1290624 is about 1136.0563366312. The cubic root of 1290624 is about 108.8762729302.

The spelling of 1290624 in words is "one million, two hundred ninety thousand, six hundred twenty-four".