40149 has 8 divisors (see below), whose sum is σ = 59520. Its totient is φ = 26748.

The previous prime is 40129. The next prime is 40151. The reversal of 40149 is 94104.

It is not a de Polignac number, because 40149 - 2¹³ = 31957 is a prime.

It is a super-2 number, since 2×40149² = 3223884402, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 40149.

It is not an unprimeable number, because it can be changed into a prime (40129) 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, 717 + ... + 770.

It is an arithmetic number, because the mean of its divisors is an integer number (7440).

2⁴⁰¹⁴⁹ is an apocalyptic number.

It is an amenable number.

40149 is a deficient number, since it is larger than the sum of its proper divisors (19371).

40149 is a wasteful number, since it uses less digits than its factorization.

40149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496 (or 1490 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 40149 is about 200.3721537540. The cubic root of 40149 is about 34.2419307184.

The spelling of 40149 in words is "forty thousand, one hundred forty-nine".