40367521 has 4 divisors (see below), whose sum is σ = 40386352. Its totient is φ = 40348692.

The previous prime is 40367513. The next prime is 40367539. The reversal of 40367521 is 12576304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40367521 - 2³ = 40367513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40367521.

It is not an unprimeable number, because it can be changed into a prime (40367221) 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, 5715 + ... + 10648.

It is an arithmetic number, because the mean of its divisors is an integer number (10096588).

Almost surely, 2^40367521 is an apocalyptic number.

It is an amenable number.

40367521 is a deficient number, since it is larger than the sum of its proper divisors (18831).

40367521 is a wasteful number, since it uses less digits than its factorization.

40367521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18830.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 40367521 is about 6353.5439716744. The cubic root of 40367521 is about 343.0394178194.

The spelling of 40367521 in words is "forty million, three hundred sixty-seven thousand, five hundred twenty-one".