121263257 has 2 divisors, whose sum is σ = 121263258. Its totient is φ = 121263256.

The previous prime is 121263229. The next prime is 121263277. The reversal of 121263257 is 752362121.

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., 81522841 + 39740416 = 9029^2 + 6304^2 .

It is a cyclic number.

It is not a de Polignac number, because 121263257 - 2¹⁶ = 121197721 is a prime.

It is not a weakly prime, because it can be changed into another prime (121263217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60631628 + 60631629.

It is an arithmetic number, because the mean of its divisors is an integer number (60631629).

Almost surely, 2^121263257 is an apocalyptic number.

It is an amenable number.

121263257 is a deficient number, since it is larger than the sum of its proper divisors (1).

121263257 is an equidigital number, since it uses as much as digits as its factorization.

121263257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 121263257 is about 11011.9597256801. The cubic root of 121263257 is about 494.9671875675.

The spelling of 121263257 in words is "one hundred twenty-one million, two hundred sixty-three thousand, two hundred fifty-seven".