140465431 has 4 divisors (see below), whose sum is σ = 144261832. Its totient is φ = 136669032.

The previous prime is 140465399. The next prime is 140465471. The reversal of 140465431 is 134564041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134564041 = 103 ⋅1306447.

It is a cyclic number.

It is not a de Polignac number, because 140465431 - 2⁵ = 140465399 is a prime.

It is a super-2 number, since 2×140465431² = 39461074612031522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140465431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140465471) 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, 1898145 + ... + 1898218.

It is an arithmetic number, because the mean of its divisors is an integer number (36065458).

Almost surely, 2^140465431 is an apocalyptic number.

140465431 is a deficient number, since it is larger than the sum of its proper divisors (3796401).

140465431 is an equidigital number, since it uses as much as digits as its factorization.

140465431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3796400.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 140465431 is about 11851.8112961690. The cubic root of 140465431 is about 519.8241898263.

The spelling of 140465431 in words is "one hundred forty million, four hundred sixty-five thousand, four hundred thirty-one".