1145154421 has 4 divisors (see below), whose sum is σ = 1145263392. Its totient is φ = 1145045452.

The previous prime is 1145154397. The next prime is 1145154427. The reversal of 1145154421 is 1244515411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1145154421 - 2⁹ = 1145153909 is a prime.

It is a super-2 number, since 2×1145154421² = 2622757295871690482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1145154421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145154427) 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, 36811 + ... + 60376.

It is an arithmetic number, because the mean of its divisors is an integer number (286315848).

Almost surely, 2^1145154421 is an apocalyptic number.

It is an amenable number.

1145154421 is a deficient number, since it is larger than the sum of its proper divisors (108971).

1145154421 is an equidigital number, since it uses as much as digits as its factorization.

1145154421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108970.

The product of its digits is 3200, while the sum is 28.

The square root of 1145154421 is about 33840.1303336734. The cubic root of 1145154421 is about 1046.2159852043.

Adding to 1145154421 its reverse (1244515411), we get a palindrome (2389669832).

The spelling of 1145154421 in words is "one billion, one hundred forty-five million, one hundred fifty-four thousand, four hundred twenty-one".