1345447427 has 4 divisors (see below), whose sum is σ = 1374074016. Its totient is φ = 1316820840.

The previous prime is 1345447423. The next prime is 1345447471. The reversal of 1345447427 is 7247445431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7247445431 = 16831 ⋅430601.

It is a cyclic number.

It is not a de Polignac number, because 1345447427 - 2² = 1345447423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345447423) 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, 14313224 + ... + 14313317.

It is an arithmetic number, because the mean of its divisors is an integer number (343518504).

Almost surely, 2^1345447427 is an apocalyptic number.

1345447427 is a deficient number, since it is larger than the sum of its proper divisors (28626589).

1345447427 is an equidigital number, since it uses as much as digits as its factorization.

1345447427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28626588.

The product of its digits is 376320, while the sum is 41.

The square root of 1345447427 is about 36680.3411516305. The cubic root of 1345447427 is about 1103.9656932362.

The spelling of 1345447427 in words is "one billion, three hundred forty-five million, four hundred forty-seven thousand, four hundred twenty-seven".