140052661 has 4 divisors (see below), whose sum is σ = 160060192. Its totient is φ = 120045132.

The previous prime is 140052641. The next prime is 140052673. The reversal of 140052661 is 166250041.

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 140052661 - 2⁷ = 140052533 is a prime.

It is a super-2 number, since 2×140052661² = 39229495706361842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140052631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10003755 + ... + 10003768.

It is an arithmetic number, because the mean of its divisors is an integer number (40015048).

Almost surely, 2^140052661 is an apocalyptic number.

It is an amenable number.

140052661 is a deficient number, since it is larger than the sum of its proper divisors (20007531).

140052661 is an equidigital number, since it uses as much as digits as its factorization.

140052661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20007530.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 140052661 is about 11834.3846903842. The cubic root of 140052661 is about 519.3145072456.

The spelling of 140052661 in words is "one hundred forty million, fifty-two thousand, six hundred sixty-one".