1345528281 has 4 divisors (see below), whose sum is σ = 1794037712. Its totient is φ = 897018852.

The previous prime is 1345528277. The next prime is 1345528357. The reversal of 1345528281 is 1828255431.

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 not a de Polignac number, because 1345528281 - 2² = 1345528277 is a prime.

It is a super-2 number, since 2×1345528281² = 3620892709941629922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345528211) 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, 224254711 + ... + 224254716.

It is an arithmetic number, because the mean of its divisors is an integer number (448509428).

Almost surely, 2^1345528281 is an apocalyptic number.

It is an amenable number.

1345528281 is a deficient number, since it is larger than the sum of its proper divisors (448509431).

1345528281 is an equidigital number, since it uses as much as digits as its factorization.

1345528281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448509430.

The product of its digits is 76800, while the sum is 39.

The square root of 1345528281 is about 36681.4432785843. The cubic root of 1345528281 is about 1103.9878068846.

The spelling of 1345528281 in words is "one billion, three hundred forty-five million, five hundred twenty-eight thousand, two hundred eighty-one".