140297642 has 8 divisors (see below), whose sum is σ = 212811300. Its totient is φ = 69360544.

The previous prime is 140297623. The next prime is 140297659. The reversal of 140297642 is 246792041.

It can be written as a sum of positive squares in 2 ways, for example, as 117267241 + 23030401 = 10829^2 + 4799^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 393917 + ... + 394272.

Almost surely, 2^140297642 is an apocalyptic number.

140297642 is a deficient number, since it is larger than the sum of its proper divisors (72513658).

140297642 is an equidigital number, since it uses as much as digits as its factorization.

140297642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788280.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 140297642 is about 11844.7305583538. The cubic root of 140297642 is about 519.6171269390.

The spelling of 140297642 in words is "one hundred forty million, two hundred ninety-seven thousand, six hundred forty-two".