1242500356 has 12 divisors (see below), whose sum is σ = 2174797660. Its totient is φ = 621129600.

The previous prime is 1242500353. The next prime is 1242500381. The reversal of 1242500356 is 6530052421.

It can be written as a sum of positive squares in 2 ways, for example, as 605947456 + 636552900 = 24616^2 + 25230^2 .

It is not an unprimeable number, because it can be changed into a prime (1242500353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4545 + ... + 50056.

Almost surely, 2^1242500356 is an apocalyptic number.

1242500356 is the 22294-th centered pentagonal number.

It is an amenable number.

1242500356 is a deficient number, since it is larger than the sum of its proper divisors (932297304).

1242500356 is a wasteful number, since it uses less digits than its factorization.

1242500356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60294 (or 60292 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1242500356 is about 35249.1185138012. The cubic root of 1242500356 is about 1075.0586897109.

Adding to 1242500356 its reverse (6530052421), we get a palindrome (7772552777).

The spelling of 1242500356 in words is "one billion, two hundred forty-two million, five hundred thousand, three hundred fifty-six".