140121408 has 112 divisors (see below), whose sum is σ = 427353984. Its totient is φ = 39690240.

The previous prime is 140121407. The next prime is 140121427. The reversal of 140121408 is 804121041.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140121407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183748 + ... + 184508.

Almost surely, 2^140121408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140121408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213676992).

140121408 is an abundant number, since it is smaller than the sum of its proper divisors (287232576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140121408 is a wasteful number, since it uses less digits than its factorization.

140121408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920 (or 910 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 140121408 is about 11837.2888787932. The cubic root of 140121408 is about 519.3994645139.

Adding to 140121408 its reverse (804121041), we get a palindrome (944242449).

The spelling of 140121408 in words is "one hundred forty million, one hundred twenty-one thousand, four hundred eight".