140502421 has 4 divisors (see below), whose sum is σ = 140526432. Its totient is φ = 140478412.

The previous prime is 140502409. The next prime is 140502491. The reversal of 140502421 is 124205041.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 124205041 = 37 ⋅3356893.

It is a cyclic number.

It is not a de Polignac number, because 140502421 - 2¹⁵ = 140469653 is a prime.

It is a super-2 number, since 2×140502421² = 39481860613722482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140502491) 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, 3150 + ... + 17056.

It is an arithmetic number, because the mean of its divisors is an integer number (35131608).

Almost surely, 2^140502421 is an apocalyptic number.

It is an amenable number.

140502421 is a deficient number, since it is larger than the sum of its proper divisors (24011).

140502421 is a wasteful number, since it uses less digits than its factorization.

140502421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24010.

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

The square root of 140502421 is about 11853.3717144111. The cubic root of 140502421 is about 519.8698157833.

Adding to 140502421 its reverse (124205041), we get a palindrome (264707462).

It can be divided in two parts, 14050 and 2421, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 140502421 in words is "one hundred forty million, five hundred two thousand, four hundred twenty-one".