140640945 has 32 divisors (see below), whose sum is σ = 238740480. Its totient is φ = 70499520.

The previous prime is 140640931. The next prime is 140640953. The reversal of 140640945 is 549046041.

It is not a de Polignac number, because 140640945 - 2²¹ = 138543793 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35452 + ... + 39218.

It is an arithmetic number, because the mean of its divisors is an integer number (7460640).

Almost surely, 2^140640945 is an apocalyptic number.

140640945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

140640945 is a deficient number, since it is larger than the sum of its proper divisors (98099535).

140640945 is a wasteful number, since it uses less digits than its factorization.

140640945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3925.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 140640945 is about 11859.2135068056. The cubic root of 140640945 is about 520.0406095011.

Adding to 140640945 its reverse (549046041), we get a palindrome (689686986).

The spelling of 140640945 in words is "one hundred forty million, six hundred forty thousand, nine hundred forty-five".