40012405 has 16 divisors (see below), whose sum is σ = 48988800. Its totient is φ = 31366720.

The previous prime is 40012397. The next prime is 40012409. The reversal of 40012405 is 50421004.

It is not a de Polignac number, because 40012405 - 2³ = 40012397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40012409) 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, 95286 + ... + 95704.

It is an arithmetic number, because the mean of its divisors is an integer number (3061800).

Almost surely, 2^40012405 is an apocalyptic number.

It is an amenable number.

40012405 is a deficient number, since it is larger than the sum of its proper divisors (8976395).

40012405 is a wasteful number, since it uses less digits than its factorization.

40012405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 40012405 is about 6325.5359456729. The cubic root of 40012405 is about 342.0305394340.

Adding to 40012405 its reverse (50421004), we get a palindrome (90433409).

The spelling of 40012405 in words is "forty million, twelve thousand, four hundred five".