253210121 has 8 divisors (see below), whose sum is σ = 268586280. Its totient is φ = 237887488.

The previous prime is 253210117. The next prime is 253210141. The reversal of 253210121 is 121012352.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 92833225 + 160376896 = 9635^2 + 12664^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253210121 - 2² = 253210117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253210121.

It is not an unprimeable number, because it can be changed into a prime (253210141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3416 + ... + 22761.

It is an arithmetic number, because the mean of its divisors is an integer number (33573285).

Almost surely, 2^253210121 is an apocalyptic number.

It is an amenable number.

253210121 is a deficient number, since it is larger than the sum of its proper divisors (15376159).

253210121 is a wasteful number, since it uses less digits than its factorization.

253210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26763.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 253210121 is about 15912.5774467872. The cubic root of 253210121 is about 632.6453985178.

Adding to 253210121 its reverse (121012352), we get a palindrome (374222473).

The spelling of 253210121 in words is "two hundred fifty-three million, two hundred ten thousand, one hundred twenty-one".