112721261 has 2 divisors, whose sum is σ = 112721262. Its totient is φ = 112721260.

The previous prime is 112721251. The next prime is 112721267. The reversal of 112721261 is 162127211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82537225 + 30184036 = 9085^2 + 5494^2 .

It is a cyclic number.

It is not a de Polignac number, because 112721261 - 2¹⁴ = 112704877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112721267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56360630 + 56360631.

It is an arithmetic number, because the mean of its divisors is an integer number (56360631).

Almost surely, 2^112721261 is an apocalyptic number.

It is an amenable number.

112721261 is a deficient number, since it is larger than the sum of its proper divisors (1).

112721261 is an equidigital number, since it uses as much as digits as its factorization.

112721261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 23.

The square root of 112721261 is about 10617.0269378956. The cubic root of 112721261 is about 483.0609667464.

Adding to 112721261 its reverse (162127211), we get a palindrome (274848472).

It can be divided in two parts, 11 and 2721261, that added together give a palindrome (2721272).

The spelling of 112721261 in words is "one hundred twelve million, seven hundred twenty-one thousand, two hundred sixty-one".