242658787 has 16 divisors (see below), whose sum is σ = 284723712. Its totient is φ = 202466880.

The previous prime is 242658781. The next prime is 242658811. The reversal of 242658787 is 787856242.

It is not a de Polignac number, because 242658787 - 2²⁷ = 108441059 is a prime.

It is a super-2 number, since 2×242658787² = 117766573816622738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 242658787.

It is not an unprimeable number, because it can be changed into a prime (242658781) 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, 208068 + ... + 209230.

It is an arithmetic number, because the mean of its divisors is an integer number (17795232).

Almost surely, 2^242658787 is an apocalyptic number.

242658787 is a deficient number, since it is larger than the sum of its proper divisors (42064925).

242658787 is a wasteful number, since it uses less digits than its factorization.

242658787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938.

The product of its digits is 1505280, while the sum is 49.

The square root of 242658787 is about 15577.5090113920. The cubic root of 242658787 is about 623.7329312347.

The spelling of 242658787 in words is "two hundred forty-two million, six hundred fifty-eight thousand, seven hundred eighty-seven".