140452661 has 4 divisors (see below), whose sum is σ = 144983424. Its totient is φ = 135921900.

The previous prime is 140452639. The next prime is 140452667. The reversal of 140452661 is 166254041.

140452661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-140452661 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 (140452667) 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, 2265335 + ... + 2265396.

It is an arithmetic number, because the mean of its divisors is an integer number (36245856).

Almost surely, 2^140452661 is an apocalyptic number.

It is an amenable number.

140452661 is a deficient number, since it is larger than the sum of its proper divisors (4530763).

140452661 is an equidigital number, since it uses as much as digits as its factorization.

140452661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4530762.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 140452661 is about 11851.2725477056. The cubic root of 140452661 is about 519.8084365883.

The spelling of 140452661 in words is "one hundred forty million, four hundred fifty-two thousand, six hundred sixty-one".