1369921 has 16 divisors (see below), whose sum is σ = 1658880. Its totient is φ = 1106640.

The previous prime is 1369897. The next prime is 1369943. The reversal of 1369921 is 1299631.

It is a cyclic number.

It is not a de Polignac number, because 1369921 - 2⁷ = 1369793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1369961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12750 + ... + 12856.

It is an arithmetic number, because the mean of its divisors is an integer number (103680).

2^1369921 is an apocalyptic number.

It is an amenable number.

1369921 is a deficient number, since it is larger than the sum of its proper divisors (288959).

1369921 is a wasteful number, since it uses less digits than its factorization.

1369921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204.

The product of its digits is 2916, while the sum is 31.

The square root of 1369921 is about 1170.4362434580. The cubic root of 1369921 is about 111.0619192988.

The spelling of 1369921 in words is "one million, three hundred sixty-nine thousand, nine hundred twenty-one".