140274661 has 4 divisors (see below), whose sum is σ = 140300524. Its totient is φ = 140248800.

The previous prime is 140274611. The next prime is 140274727. The reversal of 140274661 is 166472041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166472041 = 17 ⋅9792473.

It can be written as a sum of positive squares in 2 ways, for example, as 38365636 + 101909025 = 6194^2 + 10095^2 .

It is a cyclic number.

It is not a de Polignac number, because 140274661 - 2²⁷ = 6056933 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 (140274611) 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, 1320 + ... + 16801.

It is an arithmetic number, because the mean of its divisors is an integer number (35075131).

Almost surely, 2^140274661 is an apocalyptic number.

It is an amenable number.

140274661 is a deficient number, since it is larger than the sum of its proper divisors (25863).

140274661 is an equidigital number, since it uses as much as digits as its factorization.

140274661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25862.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 140274661 is about 11843.7604247975. The cubic root of 140274661 is about 519.5887539907.

The spelling of 140274661 in words is "one hundred forty million, two hundred seventy-four thousand, six hundred sixty-one".