40121769 has 8 divisors (see below), whose sum is σ = 53536032. Its totient is φ = 26727680.

The previous prime is 40121747. The next prime is 40121773. The reversal of 40121769 is 96712104.

It is a happy number.

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 40121769 - 2⁵ = 40121737 is a prime.

It is a super-2 number, since 2×40121769² = 3219512695378722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40121869) 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, 457 + ... + 8969.

It is an arithmetic number, because the mean of its divisors is an integer number (6692004).

Almost surely, 2^40121769 is an apocalyptic number.

It is an amenable number.

40121769 is a deficient number, since it is larger than the sum of its proper divisors (13414263).

40121769 is a wasteful number, since it uses less digits than its factorization.

40121769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10087.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 40121769 is about 6334.1746897287. The cubic root of 40121769 is about 342.3418745455.

The spelling of 40121769 in words is "forty million, one hundred twenty-one thousand, seven hundred sixty-nine".