140321421 has 12 divisors (see below), whose sum is σ = 204694620. Its totient is φ = 92620800.

The previous prime is 140321399. The next prime is 140321437. The reversal of 140321421 is 124123041.

It can be written as a sum of positive squares in 2 ways, for example, as 95765796 + 44555625 = 9786^2 + 6675^2 .

It is not a de Polignac number, because 140321421 - 2²¹ = 138224269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140321394 and 140321403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140321471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76276 + ... + 78093.

It is an arithmetic number, because the mean of its divisors is an integer number (17057885).

Almost surely, 2^140321421 is an apocalyptic number.

It is an amenable number.

140321421 is a deficient number, since it is larger than the sum of its proper divisors (64373199).

140321421 is a wasteful number, since it uses less digits than its factorization.

140321421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154476 (or 154473 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 140321421 is about 11845.7342955175. The cubic root of 140321421 is about 519.6464818578.

Adding to 140321421 its reverse (124123041), we get a palindrome (264444462).

The spelling of 140321421 in words is "one hundred forty million, three hundred twenty-one thousand, four hundred twenty-one".