140001539 has 4 divisors (see below), whose sum is σ = 141574680. Its totient is φ = 138428400.

The previous prime is 140001439. The next prime is 140001541. The reversal of 140001539 is 935100041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140001539 - 2¹⁶ = 139936003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140001439) 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, 786437 + ... + 786614.

It is an arithmetic number, because the mean of its divisors is an integer number (35393670).

Almost surely, 2^140001539 is an apocalyptic number.

140001539 is a deficient number, since it is larger than the sum of its proper divisors (1573141).

140001539 is an equidigital number, since it uses as much as digits as its factorization.

140001539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573140.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 140001539 is about 11832.2246006404. The cubic root of 140001539 is about 519.2513128563.

The spelling of 140001539 in words is "one hundred forty million, one thousand, five hundred thirty-nine".