40121499 has 16 divisors (see below), whose sum is σ = 60897024. Its totient is φ = 23258400.

The previous prime is 40121447. The next prime is 40121509. The reversal of 40121499 is 99412104.

It is not a de Polignac number, because 40121499 - 2⁸ = 40121243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40121429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25672 + ... + 27189.

It is an arithmetic number, because the mean of its divisors is an integer number (3806064).

Almost surely, 2^40121499 is an apocalyptic number.

40121499 is a deficient number, since it is larger than the sum of its proper divisors (20775525).

40121499 is a wasteful number, since it uses less digits than its factorization.

40121499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52898.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 40121499 is about 6334.1533767347. The cubic root of 40121499 is about 342.3411066123.

Subtracting 40121499 from its reverse (99412104), we obtain a triangular number (59290605 = T₁₀₈₈₉).

The spelling of 40121499 in words is "forty million, one hundred twenty-one thousand, four hundred ninety-nine".