9142561 has 2 divisors, whose sum is σ = 9142562. Its totient is φ = 9142560.

The previous prime is 9142547. The next prime is 9142571. The reversal of 9142561 is 1652419.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5017600 + 4124961 = 2240^2 + 2031^2 .

It is an emirp because it is prime and its reverse (1652419) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9142561 - 2¹³ = 9134369 is a prime.

9142561 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9142501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4571280 + 4571281.

It is an arithmetic number, because the mean of its divisors is an integer number (4571281).

Almost surely, 2^9142561 is an apocalyptic number.

It is an amenable number.

9142561 is a deficient number, since it is larger than the sum of its proper divisors (1).

9142561 is an equidigital number, since it uses as much as digits as its factorization.

9142561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 9142561 is about 3023.6668136552. Note that the first 3 decimals coincide. The cubic root of 9142561 is about 209.1009257446.

The spelling of 9142561 in words is "nine million, one hundred forty-two thousand, five hundred sixty-one".