1210261253 has 4 divisors (see below), whose sum is σ = 1211564940. Its totient is φ = 1208957568.

The previous prime is 1210261223. The next prime is 1210261309. The reversal of 1210261253 is 3521620121.

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 135536164 + 1074725089 = 11642^2 + 32783^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210261253 - 2⁶ = 1210261189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210261223) 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, 650450 + ... + 652307.

It is an arithmetic number, because the mean of its divisors is an integer number (302891235).

Almost surely, 2^1210261253 is an apocalyptic number.

It is an amenable number.

1210261253 is a deficient number, since it is larger than the sum of its proper divisors (1303687).

1210261253 is an equidigital number, since it uses as much as digits as its factorization.

1210261253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303686.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1210261253 is about 34788.8093070171. The cubic root of 1210261253 is about 1065.6789231984.

Adding to 1210261253 its reverse (3521620121), we get a palindrome (4731881374).

The spelling of 1210261253 in words is "one billion, two hundred ten million, two hundred sixty-one thousand, two hundred fifty-three".