1290402 has 24 divisors (see below), whose sum is σ = 2961036. Its totient is φ = 404736.

The previous prime is 1290379. The next prime is 1290427. The reversal of 1290402 is 2040921.

It can be written as a sum of positive squares in 2 ways, for example, as 1121481 + 168921 = 1059^2 + 411^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1803 + ... + 2414.

2^1290402 is an apocalyptic number.

1290402 is an abundant number, since it is smaller than the sum of its proper divisors (1670634).

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

1290402 is a wasteful number, since it uses less digits than its factorization.

1290402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242 (or 4239 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1290402 is about 1135.9586260071. The cubic root of 1290402 is about 108.8700299763.

The spelling of 1290402 in words is "one million, two hundred ninety thousand, four hundred two".