1290390 has 16 divisors (see below), whose sum is σ = 3097008. Its totient is φ = 344096.

The previous prime is 1290379. The next prime is 1290427. The reversal of 1290390 is 930921.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1290390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21477 + ... + 21536.

It is an arithmetic number, because the mean of its divisors is an integer number (193563).

2^1290390 is an apocalyptic number.

1290390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1290390 is an abundant number, since it is smaller than the sum of its proper divisors (1806618).

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

1290390 is a wasteful number, since it uses less digits than its factorization.

1290390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43023.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 1290390 is about 1135.9533441123. The cubic root of 1290390 is about 108.8696924989.

The spelling of 1290390 in words is "one million, two hundred ninety thousand, three hundred ninety".