140400641 has 4 divisors (see below), whose sum is σ = 140425152. Its totient is φ = 140376132.

The previous prime is 140400593. The next prime is 140400649. The reversal of 140400641 is 146004041.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 146004041 = 17 ⋅8588473.

It is a cyclic number.

It is not a de Polignac number, because 140400641 - 2²² = 136206337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140400649) 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, 1436 + ... + 16818.

It is an arithmetic number, because the mean of its divisors is an integer number (35106288).

Almost surely, 2^140400641 is an apocalyptic number.

It is an amenable number.

140400641 is a deficient number, since it is larger than the sum of its proper divisors (24511).

140400641 is an equidigital number, since it uses as much as digits as its factorization.

140400641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24510.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 140400641 is about 11849.0776434286. The cubic root of 140400641 is about 519.7442541710.

Adding to 140400641 its reverse (146004041), we get a palindrome (286404682).

The spelling of 140400641 in words is "one hundred forty million, four hundred thousand, six hundred forty-one".