40655121 has 8 divisors (see below), whose sum is σ = 58376640. Its totient is φ = 25018512.

The previous prime is 40655107. The next prime is 40655123. The reversal of 40655121 is 12155604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40655121 - 2¹⁸ = 40392977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40655091 and 40655100.

It is not an unprimeable number, because it can be changed into a prime (40655123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521181 + ... + 521258.

It is an arithmetic number, because the mean of its divisors is an integer number (7297080).

Almost surely, 2^40655121 is an apocalyptic number.

It is an amenable number.

40655121 is a deficient number, since it is larger than the sum of its proper divisors (17721519).

40655121 is a wasteful number, since it uses less digits than its factorization.

40655121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042455.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 40655121 is about 6376.1368398114. The cubic root of 40655121 is about 343.8521567011.

The spelling of 40655121 in words is "forty million, six hundred fifty-five thousand, one hundred twenty-one".