140665245 has 16 divisors (see below), whose sum is σ = 257216640. Its totient is φ = 64304064.

The previous prime is 140665241. The next prime is 140665247. The reversal of 140665245 is 542566041.

It is not a de Polignac number, because 140665245 - 2² = 140665241 is a prime.

It is a super-2 number, since 2×140665245² = 39573422301820050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140665241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 669730 + ... + 669939.

It is an arithmetic number, because the mean of its divisors is an integer number (16076040).

Almost surely, 2^140665245 is an apocalyptic number.

140665245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

140665245 is a deficient number, since it is larger than the sum of its proper divisors (116551395).

140665245 is a wasteful number, since it uses less digits than its factorization.

140665245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339684.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 140665245 is about 11860.2379824353. The cubic root of 140665245 is about 520.0705587194.

The spelling of 140665245 in words is "one hundred forty million, six hundred sixty-five thousand, two hundred forty-five".