140004551 has 4 divisors (see below), whose sum is σ = 140715432. Its totient is φ = 139293672.

The previous prime is 140004539. The next prime is 140004589. The reversal of 140004551 is 155400041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155400041 = 59 ⋅2633899.

It is a cyclic number.

It is not a de Polignac number, because 140004551 - 2²² = 135810247 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 (140004251) 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, 355145 + ... + 355538.

It is an arithmetic number, because the mean of its divisors is an integer number (35178858).

Almost surely, 2^140004551 is an apocalyptic number.

140004551 is a deficient number, since it is larger than the sum of its proper divisors (710881).

140004551 is an equidigital number, since it uses as much as digits as its factorization.

140004551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710880.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 140004551 is about 11832.3518794870. The cubic root of 140004551 is about 519.2550365624.

Adding to 140004551 its reverse (155400041), we get a palindrome (295404592).

The spelling of 140004551 in words is "one hundred forty million, four thousand, five hundred fifty-one".