1243523153 has 16 divisors (see below), whose sum is σ = 1366243200. Its totient is φ = 1127617920.

The previous prime is 1243523147. The next prime is 1243523159. The reversal of 1243523153 is 3513253421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1243523147) and next prime (1243523159).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243523153 is a prime.

It is a super-2 number, since 2×1243523153² = 3092699664094122818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243523159) 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 15 ways as a sum of consecutive naturals, for example, 26228 + ... + 56346.

It is an arithmetic number, because the mean of its divisors is an integer number (85390200).

Almost surely, 2^1243523153 is an apocalyptic number.

It is an amenable number.

1243523153 is a deficient number, since it is larger than the sum of its proper divisors (122720047).

1243523153 is a wasteful number, since it uses less digits than its factorization.

1243523153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30232.

The product of its digits is 10800, while the sum is 29.

The square root of 1243523153 is about 35263.6236510090. The cubic root of 1243523153 is about 1075.3535964615.

Adding to 1243523153 its reverse (3513253421), we get a palindrome (4756776574).

The spelling of 1243523153 in words is "one billion, two hundred forty-three million, five hundred twenty-three thousand, one hundred fifty-three".