140285431 has 8 divisors (see below), whose sum is σ = 164811024. Its totient is φ = 117721920.

The previous prime is 140285429. The next prime is 140285443. The reversal of 140285431 is 134582041.

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 140285431 - 2¹ = 140285429 is a prime.

It is a super-2 number, since 2×140285431² = 39360004301711522, 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 140285431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140285401) 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, 490366 + ... + 490651.

It is an arithmetic number, because the mean of its divisors is an integer number (20601378).

Almost surely, 2^140285431 is an apocalyptic number.

140285431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

140285431 is a deficient number, since it is larger than the sum of its proper divisors (24525593).

140285431 is a wasteful number, since it uses less digits than its factorization.

140285431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981041.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 140285431 is about 11844.2150858552. The cubic root of 140285431 is about 519.6020513024.

The spelling of 140285431 in words is "one hundred forty million, two hundred eighty-five thousand, four hundred thirty-one".