1290388 has 12 divisors (see below), whose sum is σ = 2463552. Its totient is φ = 586520.

The previous prime is 1290379. The next prime is 1290427. The reversal of 1290388 is 8830921.

It is a congruent number.

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, 14620 + ... + 14707.

It is an arithmetic number, because the mean of its divisors is an integer number (205296).

2^1290388 is an apocalyptic number.

It is an amenable number.

1290388 is a deficient number, since it is larger than the sum of its proper divisors (1173164).

1290388 is a wasteful number, since it uses less digits than its factorization.

1290388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29342 (or 29340 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1290388 is about 1135.9524637942. The cubic root of 1290388 is about 108.8696362525.

The spelling of 1290388 in words is "one million, two hundred ninety thousand, three hundred eighty-eight".