242153421 has 16 divisors (see below), whose sum is σ = 331224768. Its totient is φ = 157270400.

The previous prime is 242153399. The next prime is 242153437. The reversal of 242153421 is 124351242.

It is a cyclic number.

It is not a de Polignac number, because 242153421 - 2⁶ = 242153357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242153391 and 242153400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242133421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144430 + ... + 146096.

It is an arithmetic number, because the mean of its divisors is an integer number (20701548).

Almost surely, 2^242153421 is an apocalyptic number.

It is an amenable number.

242153421 is a deficient number, since it is larger than the sum of its proper divisors (89071347).

242153421 is a wasteful number, since it uses less digits than its factorization.

242153421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2892.

The product of its digits is 1920, while the sum is 24.

The square root of 242153421 is about 15561.2795425055. The cubic root of 242153421 is about 623.2996307730.

The spelling of 242153421 in words is "two hundred forty-two million, one hundred fifty-three thousand, four hundred twenty-one".