1242000553 has 4 divisors (see below), whose sum is σ = 1242089668. Its totient is φ = 1241911440.

The previous prime is 1242000547. The next prime is 1242000587. The reversal of 1242000553 is 3550002421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 13638249 + 1228362304 = 3693^2 + 35048^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242000553 - 2⁹ = 1242000041 is a prime.

It is a super-3 number, since 3×1242000553³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242000533) 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, 18618 + ... + 53203.

It is an arithmetic number, because the mean of its divisors is an integer number (310522417).

Almost surely, 2^1242000553 is an apocalyptic number.

It is an amenable number.

1242000553 is a deficient number, since it is larger than the sum of its proper divisors (89115).

1242000553 is an equidigital number, since it uses as much as digits as its factorization.

1242000553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89114.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1242000553 is about 35242.0282191590. The cubic root of 1242000553 is about 1074.9145208398.

Adding to 1242000553 its reverse (3550002421), we get a palindrome (4792002974).

The spelling of 1242000553 in words is "one billion, two hundred forty-two million, five hundred fifty-three", and thus it is an aban number.