245412121 has 2 divisors, whose sum is σ = 245412122. Its totient is φ = 245412120.

The previous prime is 245412109. The next prime is 245412149. The reversal of 245412121 is 121214542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184009225 + 61402896 = 13565^2 + 7836^2 .

It is a cyclic number.

It is not a de Polignac number, because 245412121 - 2¹⁹ = 244887833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 245412092 and 245412101.

It is not a weakly prime, because it can be changed into another prime (245412161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122706060 + 122706061.

It is an arithmetic number, because the mean of its divisors is an integer number (122706061).

Almost surely, 2^245412121 is an apocalyptic number.

It is an amenable number.

245412121 is a deficient number, since it is larger than the sum of its proper divisors (1).

245412121 is an equidigital number, since it uses as much as digits as its factorization.

245412121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 640, while the sum is 22.

The square root of 245412121 is about 15665.6350334099. The cubic root of 245412121 is about 626.0831317566.

Adding to 245412121 its reverse (121214542), we get a palindrome (366626663).

It can be divided in two parts, 24541 and 2121, that added together give a palindrome (26662).

The spelling of 245412121 in words is "two hundred forty-five million, four hundred twelve thousand, one hundred twenty-one".