40145541 has 8 divisors (see below), whose sum is σ = 55373280. Its totient is φ = 25840752.

The previous prime is 40145533. The next prime is 40145549. The reversal of 40145541 is 14554104.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40145533) and next prime (40145549).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40145541 - 2³ = 40145533 is a prime.

It is a super-2 number, since 2×40145541² = 3223328924365362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40145549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230635 + ... + 230808.

It is an arithmetic number, because the mean of its divisors is an integer number (6921660).

Almost surely, 2^40145541 is an apocalyptic number.

It is an amenable number.

40145541 is a deficient number, since it is larger than the sum of its proper divisors (15227739).

40145541 is a wasteful number, since it uses less digits than its factorization.

40145541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461475.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 40145541 is about 6336.0508994168. The cubic root of 40145541 is about 342.4094732954.

Adding to 40145541 its reverse (14554104), we get a palindrome (54699645).

The spelling of 40145541 in words is "forty million, one hundred forty-five thousand, five hundred forty-one".