2781241258 has 4 divisors (see below), whose sum is σ = 4171861890. Its totient is φ = 1390620628.

The previous prime is 2781241249. The next prime is 2781241289. The reversal of 2781241258 is 8521421872.

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., 2780769289 + 471969 = 52733^2 + 687^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2781241258.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695310313 + ... + 695310316.

Almost surely, 2^2781241258 is an apocalyptic number.

2781241258 is a deficient number, since it is larger than the sum of its proper divisors (1390620632).

2781241258 is a wasteful number, since it uses less digits than its factorization.

2781241258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390620631.

The product of its digits is 71680, while the sum is 40.

The square root of 2781241258 is about 52737.4748921486. The cubic root of 2781241258 is about 1406.3051086539.

The spelling of 2781241258 in words is "two billion, seven hundred eighty-one million, two hundred forty-one thousand, two hundred fifty-eight".