40012559 has 4 divisors (see below), whose sum is σ = 40048416. Its totient is φ = 39976704.

The previous prime is 40012519. The next prime is 40012573. The reversal of 40012559 is 95521004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40012559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40012519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16199 + ... + 18504.

It is an arithmetic number, because the mean of its divisors is an integer number (10012104).

Almost surely, 2^40012559 is an apocalyptic number.

40012559 is a deficient number, since it is larger than the sum of its proper divisors (35857).

40012559 is a wasteful number, since it uses less digits than its factorization.

40012559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35856.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 40012559 is about 6325.5481185428. The cubic root of 40012559 is about 342.0309782365.

The spelling of 40012559 in words is "forty million, twelve thousand, five hundred fifty-nine".