253420121 has 2 divisors, whose sum is σ = 253420122. Its totient is φ = 253420120.

The previous prime is 253420109. The next prime is 253420147. The reversal of 253420121 is 121024352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225330121 + 28090000 = 15011^2 + 5300^2 .

It is a cyclic number.

It is not a de Polignac number, because 253420121 - 2¹⁰ = 253419097 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 253420093 and 253420102.

It is not a weakly prime, because it can be changed into another prime (253420151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126710060 + 126710061.

It is an arithmetic number, because the mean of its divisors is an integer number (126710061).

Almost surely, 2^253420121 is an apocalyptic number.

It is an amenable number.

253420121 is a deficient number, since it is larger than the sum of its proper divisors (1).

253420121 is an equidigital number, since it uses as much as digits as its factorization.

253420121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 253420121 is about 15919.1746331272. The cubic root of 253420121 is about 632.8202451658.

Adding to 253420121 its reverse (121024352), we get a palindrome (374444473).

The spelling of 253420121 in words is "two hundred fifty-three million, four hundred twenty thousand, one hundred twenty-one".