140742479 has 4 divisors (see below), whose sum is σ = 140767176. Its totient is φ = 140717784.

The previous prime is 140742461. The next prime is 140742499. The reversal of 140742479 is 974247041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974247041 = 23 ⋅42358567.

It is a cyclic number.

It is not a de Polignac number, because 140742479 - 2⁸ = 140742223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140742499) 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, 1037 + ... + 16809.

It is an arithmetic number, because the mean of its divisors is an integer number (35191794).

Almost surely, 2^140742479 is an apocalyptic number.

140742479 is a deficient number, since it is larger than the sum of its proper divisors (24697).

140742479 is an equidigital number, since it uses as much as digits as its factorization.

140742479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24696.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 140742479 is about 11863.4935411117. The cubic root of 140742479 is about 520.1657250374.

The spelling of 140742479 in words is "one hundred forty million, seven hundred forty-two thousand, four hundred seventy-nine".