40420245 has 16 divisors (see below), whose sum is σ = 64768320. Its totient is φ = 21525504.

The previous prime is 40420241. The next prime is 40420267. The reversal of 40420245 is 54202404.

It is not a de Polignac number, because 40420245 - 2² = 40420241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40420241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11317 + ... + 14453.

It is an arithmetic number, because the mean of its divisors is an integer number (4048020).

Almost surely, 2^40420245 is an apocalyptic number.

It is an amenable number.

40420245 is a deficient number, since it is larger than the sum of its proper divisors (24348075).

40420245 is a wasteful number, since it uses less digits than its factorization.

40420245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 40420245 is about 6357.6917981293. The cubic root of 40420245 is about 343.1887007191.

Adding to 40420245 its reverse (54202404), we get a palindrome (94622649).

The spelling of 40420245 in words is "forty million, four hundred twenty thousand, two hundred forty-five".