1321420431 has 8 divisors (see below), whose sum is σ = 1788191104. Its totient is φ = 867798360.

The previous prime is 1321420411. The next prime is 1321420481. The reversal of 1321420431 is 1340241231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321420431 - 2⁶ = 1321420367 is a prime.

It is a super-2 number, since 2×1321420431² = 3492303910928451522, 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 = 1321420398 and 1321420407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321420411) 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, 3286915 + ... + 3287316.

It is an arithmetic number, because the mean of its divisors is an integer number (223523888).

Almost surely, 2^1321420431 is an apocalyptic number.

1321420431 is a deficient number, since it is larger than the sum of its proper divisors (466770673).

1321420431 is an equidigital number, since it uses as much as digits as its factorization.

1321420431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6574301.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1321420431 is about 36351.3470314375. The cubic root of 1321420431 is about 1097.3546436386.

Adding to 1321420431 its reverse (1340241231), we get a palindrome (2661661662).

The spelling of 1321420431 in words is "one billion, three hundred twenty-one million, four hundred twenty thousand, four hundred thirty-one".