1045172423 has 2 divisors, whose sum is σ = 1045172424. Its totient is φ = 1045172422.

The previous prime is 1045172399. The next prime is 1045172431. The reversal of 1045172423 is 3242715401.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1045172423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1045174423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522586211 + 522586212.

It is an arithmetic number, because the mean of its divisors is an integer number (522586212).

Almost surely, 2^1045172423 is an apocalyptic number.

1045172423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1045172423 is an equidigital number, since it uses as much as digits as its factorization.

1045172423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 1045172423 is about 32329.1265424849. The cubic root of 1045172423 is about 1014.8362708393.

Adding to 1045172423 its reverse (3242715401), we get a palindrome (4287887824).

The spelling of 1045172423 in words is "one billion, forty-five million, one hundred seventy-two thousand, four hundred twenty-three".