1369721 has 8 divisors (see below), whose sum is σ = 1415424. Its totient is φ = 1324800.

The previous prime is 1369657. The next prime is 1369723. The reversal of 1369721 is 1279631.

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 1369721 - 2⁶ = 1369657 is a prime.

It is a super-2 number, since 2×1369721² = 3752271235682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1369723) 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, 7001 + ... + 7193.

It is an arithmetic number, because the mean of its divisors is an integer number (176928).

2^1369721 is an apocalyptic number.

It is an amenable number.

1369721 is a deficient number, since it is larger than the sum of its proper divisors (45703).

1369721 is a wasteful number, since it uses less digits than its factorization.

1369721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391.

The product of its digits is 2268, while the sum is 29.

The square root of 1369721 is about 1170.3508021102. The cubic root of 1369721 is about 111.0565142511.

The spelling of 1369721 in words is "one million, three hundred sixty-nine thousand, seven hundred twenty-one".