140045291 has 4 divisors (see below), whose sum is σ = 142419000. Its totient is φ = 137671584.

The previous prime is 140045273. The next prime is 140045293. The reversal of 140045291 is 192540041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192540041 = 457 ⋅421313.

It is a cyclic number.

It is not a de Polignac number, because 140045291 - 2²² = 135850987 is a prime.

It is a super-2 number, since 2×140045291² = 39225367062549362, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140045291.

It is not an unprimeable number, because it can be changed into a prime (140045293) 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, 1186766 + ... + 1186883.

It is an arithmetic number, because the mean of its divisors is an integer number (35604750).

Almost surely, 2^140045291 is an apocalyptic number.

140045291 is a deficient number, since it is larger than the sum of its proper divisors (2373709).

140045291 is an equidigital number, since it uses as much as digits as its factorization.

140045291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373708.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 140045291 is about 11834.0733055022. The cubic root of 140045291 is about 519.3053977791.

The spelling of 140045291 in words is "one hundred forty million, forty-five thousand, two hundred ninety-one".