1402431321 has 8 divisors (see below), whose sum is σ = 1870154784. Its totient is φ = 934831040.

The previous prime is 1402431319. The next prime is 1402431323. The reversal of 1402431321 is 1231342041.

It is an interprime number because it is at equal distance from previous prime (1402431319) and next prime (1402431323).

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

It is a cyclic number.

It is not a de Polignac number, because 1402431321 - 2¹ = 1402431319 is a prime.

It is a super-2 number, since 2×1402431321² = 3933627220243610082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1402431323) 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, 241 + ... + 52961.

It is an arithmetic number, because the mean of its divisors is an integer number (233769348).

Almost surely, 2^1402431321 is an apocalyptic number.

It is an amenable number.

1402431321 is a deficient number, since it is larger than the sum of its proper divisors (467723463).

1402431321 is an equidigital number, since it uses as much as digits as its factorization.

1402431321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61591.

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

The square root of 1402431321 is about 37449.0496675149. The cubic root of 1402431321 is about 1119.3361608737.

Adding to 1402431321 its reverse (1231342041), we get a palindrome (2633773362).

The spelling of 1402431321 in words is "one billion, four hundred two million, four hundred thirty-one thousand, three hundred twenty-one".