1145424551 has 4 divisors (see below), whose sum is σ = 1145822832. Its totient is φ = 1145026272.

The previous prime is 1145424493. The next prime is 1145424619. The reversal of 1145424551 is 1554245411.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1145424551 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 (1145424251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194795 + ... + 200588.

It is an arithmetic number, because the mean of its divisors is an integer number (286455708).

Almost surely, 2^1145424551 is an apocalyptic number.

1145424551 is a deficient number, since it is larger than the sum of its proper divisors (398281).

1145424551 is an equidigital number, since it uses as much as digits as its factorization.

1145424551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398280.

The product of its digits is 16000, while the sum is 32.

The square root of 1145424551 is about 33844.1213654602. The cubic root of 1145424551 is about 1046.2982425546.

Adding to 1145424551 its reverse (1554245411), we get a palindrome (2699669962).

The spelling of 1145424551 in words is "one billion, one hundred forty-five million, four hundred twenty-four thousand, five hundred fifty-one".