1320290 has 16 divisors (see below), whose sum is σ = 2453760. Its totient is φ = 510960.

The previous prime is 1320287. The next prime is 1320301. The reversal of 1320290 is 920231.

It is a Curzon 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, 1820 + ... + 2439.

It is an arithmetic number, because the mean of its divisors is an integer number (153360).

2^1320290 is an apocalyptic number.

1320290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1320290 is a deficient number, since it is larger than the sum of its proper divisors (1133470).

1320290 is a wasteful number, since it uses less digits than its factorization.

1320290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4297.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1320290 is about 1149.0387286771. The cubic root of 1320290 is about 109.7041637630.

The spelling of 1320290 in words is "one million, three hundred twenty thousand, two hundred ninety".