1243152551 has 4 divisors (see below), whose sum is σ = 1260182112. Its totient is φ = 1226122992.

The previous prime is 1243152511. The next prime is 1243152563. The reversal of 1243152551 is 1552513421.

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

It is a cyclic number.

It is not a de Polignac number, because 1243152551 - 2¹⁰ = 1243151527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243152511) 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, 8514671 + ... + 8514816.

It is an arithmetic number, because the mean of its divisors is an integer number (315045528).

Almost surely, 2^1243152551 is an apocalyptic number.

1243152551 is a deficient number, since it is larger than the sum of its proper divisors (17029561).

1243152551 is an equidigital number, since it uses as much as digits as its factorization.

1243152551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17029560.

The product of its digits is 6000, while the sum is 29.

The square root of 1243152551 is about 35258.3685243660. The cubic root of 1243152551 is about 1075.2467581370.

Adding to 1243152551 its reverse (1552513421), we get a palindrome (2795665972).

The spelling of 1243152551 in words is "one billion, two hundred forty-three million, one hundred fifty-two thousand, five hundred fifty-one".