140273645 has 4 divisors (see below), whose sum is σ = 168328380. Its totient is φ = 112218912.

The previous prime is 140273603. The next prime is 140273663. The reversal of 140273645 is 546372041.

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 16752649 + 123520996 = 4093^2 + 11114^2 .

It is a cyclic number.

It is not a de Polignac number, because 140273645 - 2¹⁴ = 140257261 is a prime.

It is a super-3 number, since 3×140273645³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

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, 14027360 + ... + 14027369.

It is an arithmetic number, because the mean of its divisors is an integer number (42082095).

Almost surely, 2^140273645 is an apocalyptic number.

It is an amenable number.

140273645 is a deficient number, since it is larger than the sum of its proper divisors (28054735).

140273645 is an equidigital number, since it uses as much as digits as its factorization.

140273645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28054734.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 140273645 is about 11843.7175329370. The cubic root of 140273645 is about 519.5874995388.

The spelling of 140273645 in words is "one hundred forty million, two hundred seventy-three thousand, six hundred forty-five".