1242872033 has 4 divisors (see below), whose sum is σ = 1338477588. Its totient is φ = 1147266480.

The previous prime is 1242872021. The next prime is 1242872041. The reversal of 1242872033 is 3302782421.

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 396527569 + 846344464 = 19913^2 + 29092^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242872033 - 2⁴ = 1242872017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242872093) 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, 47802758 + ... + 47802783.

It is an arithmetic number, because the mean of its divisors is an integer number (334619397).

Almost surely, 2^1242872033 is an apocalyptic number.

1242872033 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1242872033 is a deficient number, since it is larger than the sum of its proper divisors (95605555).

1242872033 is an equidigital number, since it uses as much as digits as its factorization.

1242872033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95605554.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 1242872033 is about 35254.3902656109. The cubic root of 1242872033 is about 1075.1658753952.

The spelling of 1242872033 in words is "one billion, two hundred forty-two million, eight hundred seventy-two thousand, thirty-three".