242612009 has 2 divisors, whose sum is σ = 242612010. Its totient is φ = 242612008.

The previous prime is 242611973. The next prime is 242612021. The reversal of 242612009 is 900216242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152893225 + 89718784 = 12365^2 + 9472^2 .

It is a cyclic number.

It is not a de Polignac number, because 242612009 - 2⁸ = 242611753 is a prime.

It is a super-2 number, since 2×242612009² = 117721173822032162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242612099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121306004 + 121306005.

It is an arithmetic number, because the mean of its divisors is an integer number (121306005).

Almost surely, 2^242612009 is an apocalyptic number.

It is an amenable number.

242612009 is a deficient number, since it is larger than the sum of its proper divisors (1).

242612009 is an equidigital number, since it uses as much as digits as its factorization.

242612009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 242612009 is about 15576.0074794538. The cubic root of 242612009 is about 623.6928490896.

The spelling of 242612009 in words is "two hundred forty-two million, six hundred twelve thousand, nine".