240156121 has 4 divisors (see below), whose sum is σ = 240200100. Its totient is φ = 240112144.

The previous prime is 240156097. The next prime is 240156131. The reversal of 240156121 is 121651042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56851600 + 183304521 = 7540^2 + 13539^2 .

It is a cyclic number.

It is not a de Polignac number, because 240156121 - 2⁹ = 240155609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 240156092 and 240156101.

It is not an unprimeable number, because it can be changed into a prime (240156131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12406 + ... + 25183.

It is an arithmetic number, because the mean of its divisors is an integer number (60050025).

Almost surely, 2^240156121 is an apocalyptic number.

It is an amenable number.

240156121 is a deficient number, since it is larger than the sum of its proper divisors (43979).

240156121 is an equidigital number, since it uses as much as digits as its factorization.

240156121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43978.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 240156121 is about 15496.9713492669. The cubic root of 240156121 is about 621.5812231621.

It can be divided in two parts, 240156 and 121, that multiplied together give a triangular number (29058876 = T₇₆₂₃).

The spelling of 240156121 in words is "two hundred forty million, one hundred fifty-six thousand, one hundred twenty-one".