1321677 has 42 divisors (see below), whose sum is σ = 2367438. Its totient is φ = 734832.

The previous prime is 1321669. The next prime is 1321679. The reversal of 1321677 is 7761231.

It can be written as a sum of positive squares in only one way, i.e., 1285956 + 35721 = 1134^2 + 189^2 .

It is not a de Polignac number, because 1321677 - 2³ = 1321669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1321677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321679) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 35703 + ... + 35739.

2^1321677 is an apocalyptic number.

It is an amenable number.

1321677 is a deficient number, since it is larger than the sum of its proper divisors (1045761).

1321677 is an frugal number, since it uses more digits than its factorization.

1321677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 47 counting only the distinct ones).

The product of its digits is 1764, while the sum is 27.

The square root of 1321677 is about 1149.6421182264. The cubic root of 1321677 is about 109.7425660391.

The spelling of 1321677 in words is "one million, three hundred twenty-one thousand, six hundred seventy-seven".