242490401 has 4 divisors (see below), whose sum is σ = 250312704. Its totient is φ = 234668100.

The previous prime is 242490389. The next prime is 242490419. The reversal of 242490401 is 104094242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 242490401 - 2⁶ = 242490337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (242490461) 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, 3911105 + ... + 3911166.

It is an arithmetic number, because the mean of its divisors is an integer number (62578176).

Almost surely, 2^242490401 is an apocalyptic number.

It is an amenable number.

242490401 is a deficient number, since it is larger than the sum of its proper divisors (7822303).

242490401 is an equidigital number, since it uses as much as digits as its factorization.

242490401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7822302.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 242490401 is about 15572.1032940319. The cubic root of 242490401 is about 623.5886240813.

The spelling of 242490401 in words is "two hundred forty-two million, four hundred ninety thousand, four hundred one".