242812057 has 4 divisors (see below), whose sum is σ = 250644736. Its totient is φ = 234979380.

The previous prime is 242812051. The next prime is 242812069. The reversal of 242812057 is 750218242.

It is a happy number.

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 not a de Polignac number, because 242812057 - 2⁷ = 242811929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 7832647 = 242812057 / (2 + 4 + 2 + 8 + 1 + 2 + 0 + 5 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242812051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3916293 + ... + 3916354.

It is an arithmetic number, because the mean of its divisors is an integer number (62661184).

Almost surely, 2^242812057 is an apocalyptic number.

It is an amenable number.

242812057 is a deficient number, since it is larger than the sum of its proper divisors (7832679).

242812057 is an equidigital number, since it uses as much as digits as its factorization.

242812057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7832678.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 242812057 is about 15582.4278275242. The cubic root of 242812057 is about 623.8642259178.

The spelling of 242812057 in words is "two hundred forty-two million, eight hundred twelve thousand, fifty-seven".