40122405 has 32 divisors (see below), whose sum is σ = 71596800. Its totient is φ = 21318336.

The previous prime is 40122391. The next prime is 40122409. The reversal of 40122405 is 50422104.

It is not a de Polignac number, because 40122405 - 2⁴ = 40122389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40122409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58927 + ... + 59603.

It is an arithmetic number, because the mean of its divisors is an integer number (2237400).

Almost surely, 2^40122405 is an apocalyptic number.

40122405 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40122405 is a deficient number, since it is larger than the sum of its proper divisors (31474395).

40122405 is a wasteful number, since it uses less digits than its factorization.

40122405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40122405 is about 6334.2248933867. The cubic root of 40122405 is about 342.3436834411.

Adding to 40122405 its reverse (50422104), we get a palindrome (90544509).

The spelling of 40122405 in words is "forty million, one hundred twenty-two thousand, four hundred five".