40145307 has 4 divisors (see below), whose sum is σ = 53527080. Its totient is φ = 26763536.

The previous prime is 40145299. The next prime is 40145321. The reversal of 40145307 is 70354104.

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

It is a cyclic number.

It is not a de Polignac number, because 40145307 - 2³ = 40145299 is a prime.

It is a super-2 number, since 2×40145307² = 3223291348248498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40145377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6690882 + ... + 6690887.

It is an arithmetic number, because the mean of its divisors is an integer number (13381770).

Almost surely, 2^40145307 is an apocalyptic number.

40145307 is a deficient number, since it is larger than the sum of its proper divisors (13381773).

40145307 is a wasteful number, since it uses less digits than its factorization.

40145307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13381772.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 40145307 is about 6336.0324336291. The cubic root of 40145307 is about 342.4088080163.

The spelling of 40145307 in words is "forty million, one hundred forty-five thousand, three hundred seven".