2549842 has 4 divisors (see below), whose sum is σ = 3824766. Its totient is φ = 1274920.

The previous prime is 2549821. The next prime is 2549863. The reversal of 2549842 is 2489452.

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

It is an interprime number because it is at equal distance from previous prime (2549821) and next prime (2549863).

It can be written as a sum of positive squares in only one way, i.e., 2099601 + 450241 = 1449^2 + 671^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2549798 and 2549807.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637459 + ... + 637462.

2^2549842 is an apocalyptic number.

2549842 is a deficient number, since it is larger than the sum of its proper divisors (1274924).

2549842 is a wasteful number, since it uses less digits than its factorization.

2549842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274923.

The product of its digits is 23040, while the sum is 34.

The square root of 2549842 is about 1596.8224697818. The cubic root of 2549842 is about 136.6168990581.

It can be divided in two parts, 25498 and 42, that multiplied together give a triangular number (1070916 = T₁₄₆₃).

The spelling of 2549842 in words is "two million, five hundred forty-nine thousand, eight hundred forty-two".