1290398 has 8 divisors (see below), whose sum is σ = 1946208. Its totient is φ = 641664.

The previous prime is 1290379. The next prime is 1290427. The reversal of 1290398 is 8930921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1286 + ... + 2057.

It is an arithmetic number, because the mean of its divisors is an integer number (243276).

2^1290398 is an apocalyptic number.

1290398 is a deficient number, since it is larger than the sum of its proper divisors (655810).

1290398 is a wasteful number, since it uses less digits than its factorization.

1290398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1290398 is about 1135.9568653783. The cubic root of 1290398 is about 108.8699174840.

The spelling of 1290398 in words is "one million, two hundred ninety thousand, three hundred ninety-eight".