1345222661 has 2 divisors, whose sum is σ = 1345222662. Its totient is φ = 1345222660.

The previous prime is 1345222603. The next prime is 1345222709. The reversal of 1345222661 is 1662225431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1081160161 + 264062500 = 32881^2 + 16250^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345222661 - 2²⁶ = 1278113797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1345222601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672611330 + 672611331.

It is an arithmetic number, because the mean of its divisors is an integer number (672611331).

Almost surely, 2^1345222661 is an apocalyptic number.

It is an amenable number.

1345222661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345222661 is an equidigital number, since it uses as much as digits as its factorization.

1345222661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 1345222661 is about 36677.2771753848. The cubic root of 1345222661 is about 1103.9042148593.

The spelling of 1345222661 in words is "one billion, three hundred forty-five million, two hundred twenty-two thousand, six hundred sixty-one".