40120245 has 32 divisors (see below), whose sum is σ = 77811840. Its totient is φ = 19451520.

The previous prime is 40120219. The next prime is 40120259. The reversal of 40120245 is 54202104.

40120245 is a `hidden beast` number, since 401 + 20 + 245 = 666.

It is not a de Polignac number, because 40120245 - 2⁹ = 40119733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12024 + ... + 14993.

It is an arithmetic number, because the mean of its divisors is an integer number (2431620).

Almost surely, 2^40120245 is an apocalyptic number.

40120245 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40120245 is a deficient number, since it is larger than the sum of its proper divisors (37691595).

40120245 is a wasteful number, since it uses less digits than its factorization.

40120245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27042 (or 27036 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40120245 is about 6334.0543887782. The cubic root of 40120245 is about 342.3375399441.

Adding to 40120245 its reverse (54202104), we get a palindrome (94322349).

The spelling of 40120245 in words is "forty million, one hundred twenty thousand, two hundred forty-five".