253317121 has 4 divisors (see below), whose sum is σ = 255311872. Its totient is φ = 251322372.

The previous prime is 253317109. The next prime is 253317131. The reversal of 253317121 is 121713352.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253317121 - 2⁷ = 253316993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253317131) 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, 997185 + ... + 997438.

It is an arithmetic number, because the mean of its divisors is an integer number (63827968).

Almost surely, 2^253317121 is an apocalyptic number.

It is an amenable number.

253317121 is a deficient number, since it is larger than the sum of its proper divisors (1994751).

253317121 is a wasteful number, since it uses less digits than its factorization.

253317121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994750.

The product of its digits is 1260, while the sum is 25.

The square root of 253317121 is about 15915.9392119975. The cubic root of 253317121 is about 632.7344991226.

The spelling of 253317121 in words is "two hundred fifty-three million, three hundred seventeen thousand, one hundred twenty-one".