240126021 has 12 divisors (see below), whose sum is σ = 348086700. Its totient is φ = 159512640.

The previous prime is 240125999. The next prime is 240126023. The reversal of 240126021 is 120621042.

240126021 is a `hidden beast` number, since 2 + 401 + 260 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 95765796 + 144360225 = 9786^2 + 12015^2 .

It is not a de Polignac number, because 240126021 - 2⁵ = 240125989 is a prime.

It is a super-2 number, since 2×240126021² = 115321011922584882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 240125985 and 240126003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240126023) 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, 44946 + ... + 50003.

It is an arithmetic number, because the mean of its divisors is an integer number (29007225).

Almost surely, 2^240126021 is an apocalyptic number.

It is an amenable number.

240126021 is a deficient number, since it is larger than the sum of its proper divisors (107960679).

240126021 is a wasteful number, since it uses less digits than its factorization.

240126021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95236 (or 95233 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 240126021 is about 15496.0001613320. Note that the first 3 decimals coincide. The cubic root of 240126021 is about 621.5552534214. Note that the first 3 decimals are identical.

Adding to 240126021 its reverse (120621042), we get a palindrome (360747063).

The spelling of 240126021 in words is "two hundred forty million, one hundred twenty-six thousand, twenty-one".