1121542523 has 8 divisors (see below), whose sum is σ = 1140544560. Its totient is φ = 1102560480.

The previous prime is 1121542439. The next prime is 1121542553. The reversal of 1121542523 is 3252451211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121542523 - 2⁸ = 1121542267 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121542492 and 1121542501.

It is not an unprimeable number, because it can be changed into a prime (1121542553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146261 + ... + 153737.

It is an arithmetic number, because the mean of its divisors is an integer number (142568070).

Almost surely, 2^1121542523 is an apocalyptic number.

1121542523 is a deficient number, since it is larger than the sum of its proper divisors (19002037).

1121542523 is an equidigital number, since it uses as much as digits as its factorization.

1121542523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9997.

The product of its digits is 2400, while the sum is 26.

The square root of 1121542523 is about 33489.4389770865. The cubic root of 1121542523 is about 1038.9753600926.

Adding to 1121542523 its reverse (3252451211), we get a palindrome (4373993734).

The spelling of 1121542523 in words is "one billion, one hundred twenty-one million, five hundred forty-two thousand, five hundred twenty-three".