40613121 has 12 divisors (see below), whose sum is σ = 58720272. Its totient is φ = 27049176.

The previous prime is 40613107. The next prime is 40613141. The reversal of 40613121 is 12131604.

It is a happy number.

40613121 is a `hidden beast` number, since 40 + 613 + 12 + 1 = 666.

It is not a de Polignac number, because 40613121 - 2⁶ = 40613057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40613094 and 40613103.

It is not an unprimeable number, because it can be changed into a prime (40613141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13650 + ... + 16356.

It is an arithmetic number, because the mean of its divisors is an integer number (4893356).

Almost surely, 2^40613121 is an apocalyptic number.

It is an amenable number.

40613121 is a deficient number, since it is larger than the sum of its proper divisors (18107151).

40613121 is a wasteful number, since it uses less digits than its factorization.

40613121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4380 (or 4377 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 40613121 is about 6372.8424584325. The cubic root of 40613121 is about 343.7337069523.

Adding to 40613121 its reverse (12131604), we get a palindrome (52744725).

The spelling of 40613121 in words is "forty million, six hundred thirteen thousand, one hundred twenty-one".