140739457 has 8 divisors (see below), whose sum is σ = 142164000. Its totient is φ = 139320480.

The previous prime is 140739451. The next prime is 140739497. The reversal of 140739457 is 754937041.

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-140739457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140739451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64293 + ... + 66445.

It is an arithmetic number, because the mean of its divisors is an integer number (17770500).

Almost surely, 2^140739457 is an apocalyptic number.

It is an amenable number.

140739457 is a deficient number, since it is larger than the sum of its proper divisors (1424543).

140739457 is a wasteful number, since it uses less digits than its factorization.

140739457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 140739457 is about 11863.3661749101. The cubic root of 140739457 is about 520.1620020391.

The spelling of 140739457 in words is "one hundred forty million, seven hundred thirty-nine thousand, four hundred fifty-seven".