1242543633 has 4 divisors (see below), whose sum is σ = 1656724848. Its totient is φ = 828362420.

The previous prime is 1242543629. The next prime is 1242543637. The reversal of 1242543633 is 3363452421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1242543629) and next prime (1242543637).

It is a cyclic number.

It is not a de Polignac number, because 1242543633 - 2² = 1242543629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242543594 and 1242543603.

It is not an unprimeable number, because it can be changed into a prime (1242543637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207090603 + ... + 207090608.

It is an arithmetic number, because the mean of its divisors is an integer number (414181212).

Almost surely, 2^1242543633 is an apocalyptic number.

It is an amenable number.

1242543633 is a deficient number, since it is larger than the sum of its proper divisors (414181215).

1242543633 is an equidigital number, since it uses as much as digits as its factorization.

1242543633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414181214.

The product of its digits is 51840, while the sum is 33.

The square root of 1242543633 is about 35249.7323819628. The cubic root of 1242543633 is about 1075.0711712029.

The spelling of 1242543633 in words is "one billion, two hundred forty-two million, five hundred forty-three thousand, six hundred thirty-three".