140752391 has 8 divisors (see below), whose sum is σ = 152367600. Its totient is φ = 129249792.

The previous prime is 140752379. The next prime is 140752393. The reversal of 140752391 is 193257041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140752391 is a prime.

It is a super-2 number, since 2×140752391² = 39622471144433762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140752393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25541 + ... + 30558.

It is an arithmetic number, because the mean of its divisors is an integer number (19045950).

Almost surely, 2^140752391 is an apocalyptic number.

140752391 is a deficient number, since it is larger than the sum of its proper divisors (11615209).

140752391 is a wasteful number, since it uses less digits than its factorization.

140752391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56305.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 140752391 is about 11863.9112859124. The cubic root of 140752391 is about 520.1779359010.

The spelling of 140752391 in words is "one hundred forty million, seven hundred fifty-two thousand, three hundred ninety-one".