1345023517 has 2 divisors, whose sum is σ = 1345023518. Its totient is φ = 1345023516.

The previous prime is 1345023497. The next prime is 1345023541. The reversal of 1345023517 is 7153205431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1286943876 + 58079641 = 35874^2 + 7621^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345023517 - 2⁷ = 1345023389 is a prime.

It is a super-2 number, since 2×1345023517² = 3618176522566098578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1345023577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672511758 + 672511759.

It is an arithmetic number, because the mean of its divisors is an integer number (672511759).

Almost surely, 2^1345023517 is an apocalyptic number.

It is an amenable number.

1345023517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345023517 is an equidigital number, since it uses as much as digits as its factorization.

1345023517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 1345023517 is about 36674.5622605097. The cubic root of 1345023517 is about 1103.8497389335.

Adding to 1345023517 its reverse (7153205431), we get a palindrome (8498228948).

The spelling of 1345023517 in words is "one billion, three hundred forty-five million, twenty-three thousand, five hundred seventeen".