140420671 has 4 divisors (see below), whose sum is σ = 143686312. Its totient is φ = 137155032.

The previous prime is 140420627. The next prime is 140420713. The reversal of 140420671 is 176024041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176024041 = 251 ⋅701291.

It is a cyclic number.

It is not a de Polignac number, because 140420671 - 2²⁵ = 106866239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140420771) 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, 1632756 + ... + 1632841.

It is an arithmetic number, because the mean of its divisors is an integer number (35921578).

Almost surely, 2^140420671 is an apocalyptic number.

140420671 is a deficient number, since it is larger than the sum of its proper divisors (3265641).

140420671 is an equidigital number, since it uses as much as digits as its factorization.

140420671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265640.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 140420671 is about 11849.9228267529. The cubic root of 140420671 is about 519.7689691160.

The spelling of 140420671 in words is "one hundred forty million, four hundred twenty thousand, six hundred seventy-one".