1421369 has 4 divisors (see below), whose sum is σ = 1445520. Its totient is φ = 1397220.

The previous prime is 1421351. The next prime is 1421389. The reversal of 1421369 is 9631241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9631241 = 563 ⋅17107.

It is a cyclic number.

It is not a de Polignac number, because 1421369 - 2⁸ = 1421113 is a prime.

It is a super-2 number, since 2×1421369² = 4040579668322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1421309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11987 + ... + 12104.

It is an arithmetic number, because the mean of its divisors is an integer number (361380).

2^1421369 is an apocalyptic number.

It is an amenable number.

1421369 is a deficient number, since it is larger than the sum of its proper divisors (24151).

1421369 is an equidigital number, since it uses as much as digits as its factorization.

1421369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24150.

The product of its digits is 1296, while the sum is 26.

The square root of 1421369 is about 1192.2118100405. The cubic root of 1421369 is about 112.4351955991.

The spelling of 1421369 in words is "one million, four hundred twenty-one thousand, three hundred sixty-nine".