1242152522 has 16 divisors (see below), whose sum is σ = 2009617512. Its totient is φ = 572425920.

The previous prime is 1242152521. The next prime is 1242152533. The reversal of 1242152522 is 2252512421.

It can be written as a sum of positive squares in 4 ways, for example, as 1200691801 + 41460721 = 34651^2 + 6439^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 1242152491 and 1242152500.

It is not an unprimeable number, because it can be changed into a prime (1242152521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18953 + ... + 53324.

Almost surely, 2^1242152522 is an apocalyptic number.

1242152522 is a deficient number, since it is larger than the sum of its proper divisors (767464990).

1242152522 is a wasteful number, since it uses less digits than its factorization.

1242152522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72953.

The product of its digits is 3200, while the sum is 26.

The square root of 1242152522 is about 35244.1842294583. The cubic root of 1242152522 is about 1074.9583606010.

Adding to 1242152522 its reverse (2252512421), we get a palindrome (3494664943).

The spelling of 1242152522 in words is "one billion, two hundred forty-two million, one hundred fifty-two thousand, five hundred twenty-two".