140156945 has 4 divisors (see below), whose sum is σ = 168188340. Its totient is φ = 112125552.

The previous prime is 140156903. The next prime is 140156953. The reversal of 140156945 is 549651041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47554816 + 92602129 = 6896^2 + 9623^2 .

It is a cyclic number.

It is not a de Polignac number, because 140156945 - 2⁶ = 140156881 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14015690 + ... + 14015699.

It is an arithmetic number, because the mean of its divisors is an integer number (42047085).

Almost surely, 2^140156945 is an apocalyptic number.

It is an amenable number.

140156945 is a deficient number, since it is larger than the sum of its proper divisors (28031395).

140156945 is an equidigital number, since it uses as much as digits as its factorization.

140156945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28031394.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 140156945 is about 11838.7898452502. The cubic root of 140156945 is about 519.4433701023.

The spelling of 140156945 in words is "one hundred forty million, one hundred fifty-six thousand, nine hundred forty-five".