140400851 has 4 divisors (see below), whose sum is σ = 143825304. Its totient is φ = 136976400.

The previous prime is 140400847. The next prime is 140400859. The reversal of 140400851 is 158004041.

140400851 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 an emirpimes, since its reverse is a distinct semiprime: 158004041 = 13 ⋅12154157.

It is a cyclic number.

It is not a de Polignac number, because 140400851 - 2² = 140400847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140400859) 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, 1712165 + ... + 1712246.

It is an arithmetic number, because the mean of its divisors is an integer number (35956326).

Almost surely, 2^140400851 is an apocalyptic number.

140400851 is a deficient number, since it is larger than the sum of its proper divisors (3424453).

140400851 is an equidigital number, since it uses as much as digits as its factorization.

140400851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3424452.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 140400851 is about 11849.0865048745. The cubic root of 140400851 is about 519.7445133014.

Adding to 140400851 its reverse (158004041), we get a palindrome (298404892).

The spelling of 140400851 in words is "one hundred forty million, four hundred thousand, eight hundred fifty-one".