1402140431 has 4 divisors (see below), whose sum is σ = 1434748392. Its totient is φ = 1369532472.

The previous prime is 1402140413. The next prime is 1402140457. The reversal of 1402140431 is 1340412041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1340412041 = 307 ⋅4366163.

It is a cyclic number.

It is not a de Polignac number, because 1402140431 - 2⁶ = 1402140367 is a prime.

It is a super-2 number, since 2×1402140431² = 3931995576489731522, 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 (1402140491) 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, 16303916 + ... + 16304001.

It is an arithmetic number, because the mean of its divisors is an integer number (358687098).

Almost surely, 2^1402140431 is an apocalyptic number.

1402140431 is a deficient number, since it is larger than the sum of its proper divisors (32607961).

1402140431 is an equidigital number, since it uses as much as digits as its factorization.

1402140431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32607960.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1402140431 is about 37445.1656559295. The cubic root of 1402140431 is about 1119.2587652333.

Adding to 1402140431 its reverse (1340412041), we get a palindrome (2742552472).

The spelling of 1402140431 in words is "one billion, four hundred two million, one hundred forty thousand, four hundred thirty-one".