140924081 has 4 divisors (see below), whose sum is σ = 141539700. Its totient is φ = 140308464.

The previous prime is 140924041. The next prime is 140924089. The reversal of 140924081 is 180429041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61089856 + 79834225 = 7816^2 + 8935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140924081 is a prime.

It is a super-2 number, since 2×140924081² = 39719193211389122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140924089) 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, 307466 + ... + 307923.

It is an arithmetic number, because the mean of its divisors is an integer number (35384925).

Almost surely, 2^140924081 is an apocalyptic number.

It is an amenable number.

140924081 is a deficient number, since it is larger than the sum of its proper divisors (615619).

140924081 is an equidigital number, since it uses as much as digits as its factorization.

140924081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615618.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 140924081 is about 11871.1448900264. The cubic root of 140924081 is about 520.3893545977.

The spelling of 140924081 in words is "one hundred forty million, nine hundred twenty-four thousand, eighty-one".