121412257 has 4 divisors (see below), whose sum is σ = 121457556. Its totient is φ = 121366960.

The previous prime is 121412251. The next prime is 121412267. The reversal of 121412257 is 752214121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105698961 + 15713296 = 10281^2 + 3964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121412257 is a prime.

It is a super-2 number, since 2×121412257² = 29481872299668098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121412251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18358 + ... + 24079.

It is an arithmetic number, because the mean of its divisors is an integer number (30364389).

Almost surely, 2^121412257 is an apocalyptic number.

It is an amenable number.

121412257 is a deficient number, since it is larger than the sum of its proper divisors (45299).

121412257 is an equidigital number, since it uses as much as digits as its factorization.

121412257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45298.

The product of its digits is 1120, while the sum is 25.

The square root of 121412257 is about 11018.7230203867. The cubic root of 121412257 is about 495.1698318722.

Adding to 121412257 its reverse (752214121), we get a palindrome (873626378).

The spelling of 121412257 in words is "one hundred twenty-one million, four hundred twelve thousand, two hundred fifty-seven".