1297290 has 32 divisors (see below), whose sum is σ = 3157056. Its totient is φ = 341120.

The previous prime is 1297279. The next prime is 1297297. The reversal of 1297290 is 927921.

It is a super-2 number, since 2×1297290² = 3365922688200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1297297) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2230 + ... + 2750.

It is an arithmetic number, because the mean of its divisors is an integer number (98658).

2^1297290 is an apocalyptic number.

1297290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1297290 is an abundant number, since it is smaller than the sum of its proper divisors (1859766).

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

1297290 is a wasteful number, since it uses less digits than its factorization.

1297290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 1297290 is about 1138.9863914903. The cubic root of 1297290 is about 109.0633977343.

The spelling of 1297290 in words is "one million, two hundred ninety-seven thousand, two hundred ninety".