140025421 has 4 divisors (see below), whose sum is σ = 147395200. Its totient is φ = 132655644.

The previous prime is 140025409. The next prime is 140025469. The reversal of 140025421 is 124520041.

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.

It is not a de Polignac number, because 140025421 - 2⁷ = 140025293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 7369759 = 140025421 / (1 + 4 + 0 + 0 + 2 + 5 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140025121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3684861 + ... + 3684898.

It is an arithmetic number, because the mean of its divisors is an integer number (36848800).

Almost surely, 2^140025421 is an apocalyptic number.

It is an amenable number.

140025421 is a deficient number, since it is larger than the sum of its proper divisors (7369779).

140025421 is an equidigital number, since it uses as much as digits as its factorization.

140025421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7369778.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 140025421 is about 11833.2337507547. The cubic root of 140025421 is about 519.2808364718.

Adding to 140025421 its reverse (124520041), we get a palindrome (264545462).

The spelling of 140025421 in words is "one hundred forty million, twenty-five thousand, four hundred twenty-one".