2781242 has 4 divisors (see below), whose sum is σ = 4171866. Its totient is φ = 1390620.

The previous prime is 2781221. The next prime is 2781271. The reversal of 2781242 is 2421872.

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., 1990921 + 790321 = 1411^2 + 889^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695309 + ... + 695312.

2^2781242 is an apocalyptic number.

2781242 is a deficient number, since it is larger than the sum of its proper divisors (1390624).

2781242 is a wasteful number, since it uses less digits than its factorization.

2781242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390623.

The product of its digits is 1792, while the sum is 26.

The square root of 2781242 is about 1667.7056095127. The cubic root of 2781242 is about 140.6305233715.

The spelling of 2781242 in words is "two million, seven hundred eighty-one thousand, two hundred forty-two".