40154 has 8 divisors (see below), whose sum is σ = 63828. Its totient is φ = 18880.

The previous prime is 40153. The next prime is 40163. The reversal of 40154 is 45104.

It can be written as a sum of positive squares in 2 ways, for example, as 34225 + 5929 = 185^2 + 77^2 .

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

It is a super-2 number, since 2×40154² = 3224687432, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40151) 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, 557 + ... + 624.

2⁴⁰¹⁵⁴ is an apocalyptic number.

40154 is a deficient number, since it is larger than the sum of its proper divisors (23674).

40154 is a wasteful number, since it uses less digits than its factorization.

40154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 40154 is about 200.3846301491. The cubic root of 40154 is about 34.2433521116.

Adding to 40154 its reverse (45104), we get a palindrome (85258).

Subtracting 40154 from its reverse (45104), we obtain a triangular number (4950 = T₉₉).

The spelling of 40154 in words is "forty thousand, one hundred fifty-four".