1242857522 has 32 divisors (see below), whose sum is σ = 1998463104. Its totient is φ = 577657600.

The previous prime is 1242857503. The next prime is 1242857527. The reversal of 1242857522 is 2257582421.

It is not an unprimeable number, because it can be changed into a prime (1242857527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1170872 + ... + 1171932.

It is an arithmetic number, because the mean of its divisors is an integer number (62451972).

Almost surely, 2^1242857522 is an apocalyptic number.

1242857522 is a deficient number, since it is larger than the sum of its proper divisors (755605582).

1242857522 is a wasteful number, since it uses less digits than its factorization.

1242857522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474.

The product of its digits is 89600, while the sum is 38.

The square root of 1242857522 is about 35254.1844608551. The cubic root of 1242857522 is about 1075.1616910565.

The spelling of 1242857522 in words is "one billion, two hundred forty-two million, eight hundred fifty-seven thousand, five hundred twenty-two".