262121161 has 2 divisors, whose sum is σ = 262121162. Its totient is φ = 262121160.

The previous prime is 262121149. The next prime is 262121183. The reversal of 262121161 is 161121262.

It is an a-pointer prime, because the next prime (262121183) can be obtained adding 262121161 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227074761 + 35046400 = 15069^2 + 5920^2 .

It is a cyclic number.

It is not a de Polignac number, because 262121161 - 2¹³ = 262112969 is a prime.

It is not a weakly prime, because it can be changed into another prime (262125161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131060580 + 131060581.

It is an arithmetic number, because the mean of its divisors is an integer number (131060581).

Almost surely, 2^262121161 is an apocalyptic number.

It is an amenable number.

262121161 is a deficient number, since it is larger than the sum of its proper divisors (1).

262121161 is an equidigital number, since it uses as much as digits as its factorization.

262121161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 22.

The square root of 262121161 is about 16190.1562994308. The cubic root of 262121161 is about 639.9814130344.

The spelling of 262121161 in words is "two hundred sixty-two million, one hundred twenty-one thousand, one hundred sixty-one".