1421342431 has 4 divisors (see below), whose sum is σ = 1483139952. Its totient is φ = 1359544912.

The previous prime is 1421342413. The next prime is 1421342513. The reversal of 1421342431 is 1342431241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1421342431 - 2⁵ = 1421342399 is a prime.

It is a super-2 number, since 2×1421342431² = 4040428612321979522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421342396 and 1421342405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421342411) 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, 30898726 + ... + 30898771.

It is an arithmetic number, because the mean of its divisors is an integer number (370784988).

Almost surely, 2^1421342431 is an apocalyptic number.

1421342431 is a deficient number, since it is larger than the sum of its proper divisors (61797521).

1421342431 is an equidigital number, since it uses as much as digits as its factorization.

1421342431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61797520.

The product of its digits is 2304, while the sum is 25.

The square root of 1421342431 is about 37700.6953649399. The cubic root of 1421342431 is about 1124.3449502820.

Adding to 1421342431 its reverse (1342431241), we get a palindrome (2763773672).

It can be divided in two parts, 14213 and 42431, that added together give a square (56644 = 238²).

The spelling of 1421342431 in words is "one billion, four hundred twenty-one million, three hundred forty-two thousand, four hundred thirty-one".