40012487 has 4 divisors (see below), whose sum is σ = 40053000. Its totient is φ = 39971976.

The previous prime is 40012481. The next prime is 40012517. The reversal of 40012487 is 78421004.

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

It is a cyclic number.

It is not a de Polignac number, because 40012487 - 2⁴ = 40012471 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 (40012481) 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, 18737 + ... + 20762.

It is an arithmetic number, because the mean of its divisors is an integer number (10013250).

Almost surely, 2^40012487 is an apocalyptic number.

40012487 is a deficient number, since it is larger than the sum of its proper divisors (40513).

40012487 is a wasteful number, since it uses less digits than its factorization.

40012487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40512.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 40012487 is about 6325.5424273338. The cubic root of 40012487 is about 342.0307730822.

The spelling of 40012487 in words is "forty million, twelve thousand, four hundred eighty-seven".