2557574242 has 4 divisors (see below), whose sum is σ = 3836361366. Its totient is φ = 1278787120.

The previous prime is 2557574237. The next prime is 2557574281. The reversal of 2557574242 is 2424757552.

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., 2304096001 + 253478241 = 48001^2 + 15921^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639393559 + ... + 639393562.

Almost surely, 2^2557574242 is an apocalyptic number.

2557574242 is a deficient number, since it is larger than the sum of its proper divisors (1278787124).

2557574242 is a wasteful number, since it uses less digits than its factorization.

2557574242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278787123.

The product of its digits is 784000, while the sum is 43.

The square root of 2557574242 is about 50572.4652553146. The cubic root of 2557574242 is about 1367.5485387288.

The spelling of 2557574242 in words is "two billion, five hundred fifty-seven million, five hundred seventy-four thousand, two hundred forty-two".