40168121 has 8 divisors (see below), whose sum is σ = 46336320. Its totient is φ = 34107408.

The previous prime is 40168087. The next prime is 40168153. The reversal of 40168121 is 12186104.

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

It is a cyclic number.

It is not a de Polignac number, because 40168121 - 2⁶ = 40168057 is a prime.

It is a super-2 number, since 2×40168121² = 3226955889341282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40168621) 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, 26066 + ... + 27563.

It is an arithmetic number, because the mean of its divisors is an integer number (5792040).

Almost surely, 2^40168121 is an apocalyptic number.

It is an amenable number.

40168121 is a deficient number, since it is larger than the sum of its proper divisors (6168199).

40168121 is a wasteful number, since it uses less digits than its factorization.

40168121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53743.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 40168121 is about 6337.8325159316. The cubic root of 40168121 is about 342.4736577321.

The spelling of 40168121 in words is "forty million, one hundred sixty-eight thousand, one hundred twenty-one".