40143745 has 4 divisors (see below), whose sum is σ = 48172500. Its totient is φ = 32114992.

The previous prime is 40143731. The next prime is 40143757. The reversal of 40143745 is 54734104.

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 5180176 + 34963569 = 2276^2 + 5913^2 .

It is a cyclic number.

It is not a de Polignac number, because 40143745 - 2²⁵ = 6589313 is a prime.

It is a super-2 number, since 2×40143745² = 3223040525250050, which contains 22 as substring.

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, 4014370 + ... + 4014379.

It is an arithmetic number, because the mean of its divisors is an integer number (12043125).

Almost surely, 2^40143745 is an apocalyptic number.

It is an amenable number.

40143745 is a deficient number, since it is larger than the sum of its proper divisors (8028755).

40143745 is an equidigital number, since it uses as much as digits as its factorization.

40143745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8028754.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 40143745 is about 6335.9091691722. The cubic root of 40143745 is about 342.4043670697.

Adding to 40143745 its reverse (54734104), we get a palindrome (94877849).

The spelling of 40143745 in words is "forty million, one hundred forty-three thousand, seven hundred forty-five".