1421431 has 4 divisors (see below), whose sum is σ = 1550664. Its totient is φ = 1292200.

The previous prime is 1421417. The next prime is 1421437. The reversal of 1421431 is 1341241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1341241 = 11 ⋅121931.

It is a cyclic number.

It is not a de Polignac number, because 1421431 - 2⁹ = 1420919 is a prime.

It is a super-2 number, since 2×1421431² = 4040932175522, 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 (1421437) 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, 64600 + ... + 64621.

It is an arithmetic number, because the mean of its divisors is an integer number (387666).

2^1421431 is an apocalyptic number.

1421431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1421431 is a deficient number, since it is larger than the sum of its proper divisors (129233).

1421431 is a wasteful number, since it uses less digits than its factorization.

1421431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129232.

The product of its digits is 96, while the sum is 16.

The square root of 1421431 is about 1192.2378118480. The cubic root of 1421431 is about 112.4368303800.

Adding to 1421431 its reverse (1341241), we get a palindrome (2762672).

The spelling of 1421431 in words is "one million, four hundred twenty-one thousand, four hundred thirty-one".