140021316 has 36 divisors (see below), whose sum is σ = 374764572. Its totient is φ = 43928064.

The previous prime is 140021311. The next prime is 140021341. The reversal of 140021316 is 613120041.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71064900 + 68956416 = 8430^2 + 8304^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (140021311) 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, 113785 + ... + 115008.

It is an arithmetic number, because the mean of its divisors is an integer number (10410127).

Almost surely, 2^140021316 is an apocalyptic number.

It is an amenable number.

140021316 is an abundant number, since it is smaller than the sum of its proper divisors (234743256).

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

140021316 is a wasteful number, since it uses less digits than its factorization.

140021316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228820 (or 228815 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 140021316 is about 11833.0602973195. The cubic root of 140021316 is about 519.2757619916.

Adding to 140021316 its reverse (613120041), we get a palindrome (753141357).

The spelling of 140021316 in words is "one hundred forty million, twenty-one thousand, three hundred sixteen".