1242832553 has 4 divisors (see below), whose sum is σ = 1276422660. Its totient is φ = 1209242448.

The previous prime is 1242832523. The next prime is 1242832559. The reversal of 1242832553 is 3552382421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 521802649 + 721029904 = 22843^2 + 26852^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242832553 - 2¹⁶ = 1242767017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242832559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16794998 + ... + 16795071.

It is an arithmetic number, because the mean of its divisors is an integer number (319105665).

Almost surely, 2^1242832553 is an apocalyptic number.

It is an amenable number.

1242832553 is a deficient number, since it is larger than the sum of its proper divisors (33590107).

1242832553 is an equidigital number, since it uses as much as digits as its factorization.

1242832553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33590106.

The product of its digits is 57600, while the sum is 35.

The square root of 1242832553 is about 35253.8303309016. The cubic root of 1242832553 is about 1075.1544910110.

The spelling of 1242832553 in words is "one billion, two hundred forty-two million, eight hundred thirty-two thousand, five hundred fifty-three".