140564461 has 4 divisors (see below), whose sum is σ = 140596192. Its totient is φ = 140532732.

The previous prime is 140564407. The next prime is 140564467. The reversal of 140564461 is 164465041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140564461 - 2²⁷ = 6346733 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 (140564467) 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, 7881 + ... + 18526.

It is an arithmetic number, because the mean of its divisors is an integer number (35149048).

Almost surely, 2^140564461 is an apocalyptic number.

It is an amenable number.

140564461 is a deficient number, since it is larger than the sum of its proper divisors (31731).

140564461 is an equidigital number, since it uses as much as digits as its factorization.

140564461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31730.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 140564461 is about 11855.9884024910. The cubic root of 140564461 is about 519.9463221219.

The spelling of 140564461 in words is "one hundred forty million, five hundred sixty-four thousand, four hundred sixty-one".