258042403 has 8 divisors (see below), whose sum is σ = 265891472. Its totient is φ = 250239456.

The previous prime is 258042391. The next prime is 258042409. The reversal of 258042403 is 304240852.

258042403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

258042403 is a nontrivial binomial coefficient, being equal to C(22718, 2).

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

It is a cyclic number.

It is not a de Polignac number, because 258042403 - 2²⁵ = 224487971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (258042409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 22717.

It is an arithmetic number, because the mean of its divisors is an integer number (33236434).

Almost surely, 2^258042403 is an apocalyptic number.

258042403 is the 22717-th triangular number and also the 11359-th hexagonal number.

258042403 is the 7573-rd centered nonagonal number.

258042403 is a deficient number, since it is larger than the sum of its proper divisors (7849069).

258042403 is a wasteful number, since it uses less digits than its factorization.

258042403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23061.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 258042403 is about 16063.6982977146. The cubic root of 258042403 is about 636.6445503070.

The spelling of 258042403 in words is "two hundred fifty-eight million, forty-two thousand, four hundred three".