40253121 has 24 divisors (see below), whose sum is σ = 59282496. Its totient is φ = 26316000.

The previous prime is 40253113. The next prime is 40253167. The reversal of 40253121 is 12135204.

It is not a de Polignac number, because 40253121 - 2³ = 40253113 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40253094 and 40253103.

It is not an unprimeable number, because it can be changed into a prime (40254121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160246 + ... + 160496.

It is an arithmetic number, because the mean of its divisors is an integer number (2470104).

Almost surely, 2^40253121 is an apocalyptic number.

It is an amenable number.

40253121 is a deficient number, since it is larger than the sum of its proper divisors (19029375).

40253121 is a wasteful number, since it uses less digits than its factorization.

40253121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 40253121 is about 6344.5347347146. The cubic root of 40253121 is about 342.7150577182.

Adding to 40253121 its reverse (12135204), we get a palindrome (52388325).

The spelling of 40253121 in words is "forty million, two hundred fifty-three thousand, one hundred twenty-one".