140427761 has 4 divisors (see below), whose sum is σ = 140451492. Its totient is φ = 140404032.

The previous prime is 140427757. The next prime is 140427767. The reversal of 140427761 is 167724041.

140427761 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 brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 167724041 = 293 ⋅572437.

It can be written as a sum of positive squares in 2 ways, for example, as 76667536 + 63760225 = 8756^2 + 7985^2 .

It is a cyclic number.

It is not a de Polignac number, because 140427761 - 2² = 140427757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140427767) 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, 5045 + ... + 17501.

It is an arithmetic number, because the mean of its divisors is an integer number (35112873).

Almost surely, 2^140427761 is an apocalyptic number.

It is an amenable number.

140427761 is a deficient number, since it is larger than the sum of its proper divisors (23731).

140427761 is a wasteful number, since it uses less digits than its factorization.

140427761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23730.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 140427761 is about 11850.2219810432. The cubic root of 140427761 is about 519.7777168783. Note that the first 4 decimals are identical.

The spelling of 140427761 in words is "one hundred forty million, four hundred twenty-seven thousand, seven hundred sixty-one".