1421357 has 4 divisors (see below), whose sum is σ = 1624416. Its totient is φ = 1218300.

The previous prime is 1421351. The next prime is 1421389. The reversal of 1421357 is 7531241.

1421357 is nontrivially palindromic in base 6.

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.

It is a cyclic number.

It is not a de Polignac number, because 1421357 - 2⁶ = 1421293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421351) 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, 101519 + ... + 101532.

It is an arithmetic number, because the mean of its divisors is an integer number (406104).

2^1421357 is an apocalyptic number.

It is an amenable number.

1421357 is a deficient number, since it is larger than the sum of its proper divisors (203059).

1421357 is an equidigital number, since it uses as much as digits as its factorization.

1421357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203058.

The product of its digits is 840, while the sum is 23.

The square root of 1421357 is about 1192.2067773671. The cubic root of 1421357 is about 112.4348791844.

Adding to 1421357 its reverse (7531241), we get a palindrome (8952598).

The spelling of 1421357 in words is "one million, four hundred twenty-one thousand, three hundred fifty-seven".