40102245 has 12 divisors (see below), whose sum is σ = 69510636. Its totient is φ = 21387840.

The previous prime is 40102213. The next prime is 40102253. The reversal of 40102245 is 54220104.

It can be written as a sum of positive squares in 2 ways, for example, as 31911201 + 8191044 = 5649^2 + 2862^2 .

It is not a de Polignac number, because 40102245 - 2⁵ = 40102213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 445536 + ... + 445625.

It is an arithmetic number, because the mean of its divisors is an integer number (5792553).

Almost surely, 2^40102245 is an apocalyptic number.

40102245 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40102245 is a deficient number, since it is larger than the sum of its proper divisors (29408391).

40102245 is a wasteful number, since it uses less digits than its factorization.

40102245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891172 (or 891169 counting only the distinct ones).

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

The square root of 40102245 is about 6332.6333385093. The cubic root of 40102245 is about 342.2863355585.

Adding to 40102245 its reverse (54220104), we get a palindrome (94322349).

The spelling of 40102245 in words is "forty million, one hundred two thousand, two hundred forty-five".