268120642 has 4 divisors (see below), whose sum is σ = 402180966. Its totient is φ = 134060320.

The previous prime is 268120579. The next prime is 268120649. The reversal of 268120642 is 246021862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 238733401 + 29387241 = 15451^2 + 5421^2 .

It is not an unprimeable number, because it can be changed into a prime (268120649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67030159 + ... + 67030162.

Almost surely, 2^268120642 is an apocalyptic number.

268120642 is a deficient number, since it is larger than the sum of its proper divisors (134060324).

268120642 is a wasteful number, since it uses less digits than its factorization.

268120642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134060323.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 268120642 is about 16374.3898206926. The cubic root of 268120642 is about 644.8273014796.

The spelling of 268120642 in words is "two hundred sixty-eight million, one hundred twenty thousand, six hundred forty-two".