1317621 has 8 divisors (see below), whose sum is σ = 1764000. Its totient is φ = 874832.

The previous prime is 1317599. The next prime is 1317629. The reversal of 1317621 is 1267131.

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

It is a cyclic number.

It is not a de Polignac number, because 1317621 - 2⁷ = 1317493 is a prime.

It is a super-2 number, since 2×1317621² = 3472250199282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317629) 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 7 ways as a sum of consecutive naturals, for example, 130 + ... + 1628.

It is an arithmetic number, because the mean of its divisors is an integer number (220500).

2^1317621 is an apocalyptic number.

It is an amenable number.

1317621 is a deficient number, since it is larger than the sum of its proper divisors (446379).

1317621 is a wasteful number, since it uses less digits than its factorization.

1317621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795.

The product of its digits is 252, while the sum is 21.

The square root of 1317621 is about 1147.8767355426. The cubic root of 1317621 is about 109.6301906368.

The spelling of 1317621 in words is "one million, three hundred seventeen thousand, six hundred twenty-one".