1317290 has 16 divisors (see below), whose sum is σ = 2553768. Its totient is φ = 486336.

The previous prime is 1317271. The next prime is 1317299. The reversal of 1317290 is 927131.

It can be written as a sum of positive squares in 4 ways, for example, as 1018081 + 299209 = 1009^2 + 547^2 .

It is not an unprimeable number, because it can be changed into a prime (1317299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4937 + ... + 5196.

2^1317290 is an apocalyptic number.

1317290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1317290 is a deficient number, since it is larger than the sum of its proper divisors (1236478).

1317290 is a wasteful number, since it uses less digits than its factorization.

1317290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10153.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1317290 is about 1147.7325472426. The cubic root of 1317290 is about 109.6210097894.

The spelling of 1317290 in words is "one million, three hundred seventeen thousand, two hundred ninety".