140402512 has 20 divisors (see below), whose sum is σ = 277164180. Its totient is φ = 68876288.

The previous prime is 140402501. The next prime is 140402519. The reversal of 140402512 is 215204041.

140402512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 44675856 + 95726656 = 6684^2 + 9784^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 140402512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140402519) 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, 81937 + ... + 83632.

It is an arithmetic number, because the mean of its divisors is an integer number (13858209).

Almost surely, 2^140402512 is an apocalyptic number.

It is an amenable number.

140402512 is a deficient number, since it is larger than the sum of its proper divisors (136761668).

140402512 is a wasteful number, since it uses less digits than its factorization.

140402512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165630 (or 165624 counting only the distinct ones).

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

The square root of 140402512 is about 11849.1565944585. The cubic root of 140402512 is about 519.7465628907.

Adding to 140402512 its reverse (215204041), we get a palindrome (355606553).

The spelling of 140402512 in words is "one hundred forty million, four hundred two thousand, five hundred twelve".