140121534 has 16 divisors (see below), whose sum is σ = 320277888. Its totient is φ = 40034712.

The previous prime is 140121521. The next prime is 140121551. The reversal of 140121534 is 435121041.

140121534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 140121534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1668072 + ... + 1668155.

It is an arithmetic number, because the mean of its divisors is an integer number (20017368).

Almost surely, 2^140121534 is an apocalyptic number.

140121534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

140121534 is an abundant number, since it is smaller than the sum of its proper divisors (180156354).

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

140121534 is a wasteful number, since it uses less digits than its factorization.

140121534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336239.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 140121534 is about 11837.2942009566. The cubic root of 140121534 is about 519.3996201987.

Adding to 140121534 its reverse (435121041), we get a palindrome (575242575).

The spelling of 140121534 in words is "one hundred forty million, one hundred twenty-one thousand, five hundred thirty-four".