855246121 has 2 divisors, whose sum is σ = 855246122. Its totient is φ = 855246120.

The previous prime is 855246113. The next prime is 855246127. The reversal of 855246121 is 121642558.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 844716096 + 10530025 = 29064^2 + 3245^2 .

It is a cyclic number.

It is not a de Polignac number, because 855246121 - 2³ = 855246113 is a prime.

It is not a weakly prime, because it can be changed into another prime (855246127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427623060 + 427623061.

It is an arithmetic number, because the mean of its divisors is an integer number (427623061).

Almost surely, 2^855246121 is an apocalyptic number.

It is an amenable number.

855246121 is a deficient number, since it is larger than the sum of its proper divisors (1).

855246121 is an equidigital number, since it uses as much as digits as its factorization.

855246121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 34.

The square root of 855246121 is about 29244.5913118990. The cubic root of 855246121 is about 949.2130587439.

Adding to 855246121 its reverse (121642558), we get a palindrome (976888679).

The spelling of 855246121 in words is "eight hundred fifty-five million, two hundred forty-six thousand, one hundred twenty-one".