40386121 has 4 divisors (see below), whose sum is σ = 40694544. Its totient is φ = 40077700.

The previous prime is 40386119. The next prime is 40386161. The reversal of 40386121 is 12168304.

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 40386121 - 2¹ = 40386119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40386161) 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, 154015 + ... + 154276.

It is an arithmetic number, because the mean of its divisors is an integer number (10173636).

Almost surely, 2^40386121 is an apocalyptic number.

It is an amenable number.

40386121 is a deficient number, since it is larger than the sum of its proper divisors (308423).

40386121 is a wasteful number, since it uses less digits than its factorization.

40386121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308422.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 40386121 is about 6355.0075531033. The cubic root of 40386121 is about 343.0920967495.

The spelling of 40386121 in words is "forty million, three hundred eighty-six thousand, one hundred twenty-one".