1145134421 has 4 divisors (see below), whose sum is σ = 1151532000. Its totient is φ = 1138736844.

The previous prime is 1145134411. The next prime is 1145134493. The reversal of 1145134421 is 1244315411.

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.

It is a cyclic number.

It is not a de Polignac number, because 1145134421 - 2⁶ = 1145134357 is a prime.

It is a super-2 number, since 2×1145134421² = 2622665684318010482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145134411) 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 3 ways as a sum of consecutive naturals, for example, 3198521 + ... + 3198878.

It is an arithmetic number, because the mean of its divisors is an integer number (287883000).

Almost surely, 2^1145134421 is an apocalyptic number.

It is an amenable number.

1145134421 is a deficient number, since it is larger than the sum of its proper divisors (6397579).

1145134421 is an equidigital number, since it uses as much as digits as its factorization.

1145134421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6397578.

The product of its digits is 1920, while the sum is 26.

The square root of 1145134421 is about 33839.8348252470. The cubic root of 1145134421 is about 1046.2098944853.

Adding to 1145134421 its reverse (1244315411), we get a palindrome (2389449832).

The spelling of 1145134421 in words is "one billion, one hundred forty-five million, one hundred thirty-four thousand, four hundred twenty-one".