140545657 has 8 divisors (see below), whose sum is σ = 161292032. Its totient is φ = 119966400.

The previous prime is 140545649. The next prime is 140545667. The reversal of 140545657 is 756545041.

It is a happy number.

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 140545657 - 2³ = 140545649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140545607) 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, 39969 + ... + 43342.

It is an arithmetic number, because the mean of its divisors is an integer number (20161504).

Almost surely, 2^140545657 is an apocalyptic number.

It is an amenable number.

140545657 is a deficient number, since it is larger than the sum of its proper divisors (20746375).

140545657 is an equidigital number, since it uses as much as digits as its factorization.

140545657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83559.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 140545657 is about 11855.1953589977. The cubic root of 140545657 is about 519.9231358282.

The spelling of 140545657 in words is "one hundred forty million, five hundred forty-five thousand, six hundred fifty-seven".