1345532381 has 2 divisors, whose sum is σ = 1345532382. Its totient is φ = 1345532380.

The previous prime is 1345532341. The next prime is 1345532387. The reversal of 1345532381 is 1832355431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1018248100 + 327284281 = 31910^2 + 18091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345532381 is a prime.

It is a super-2 number, since 2×1345532381² = 3620914776639058322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1345532387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672766190 + 672766191.

It is an arithmetic number, because the mean of its divisors is an integer number (672766191).

Almost surely, 2^1345532381 is an apocalyptic number.

It is an amenable number.

1345532381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345532381 is an equidigital number, since it uses as much as digits as its factorization.

1345532381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 35.

The square root of 1345532381 is about 36681.4991651105. The cubic root of 1345532381 is about 1103.9889282150.

The spelling of 1345532381 in words is "one billion, three hundred forty-five million, five hundred thirty-two thousand, three hundred eighty-one".