1210457213 has 4 divisors (see below), whose sum is σ = 1383379680. Its totient is φ = 1037534748.

The previous prime is 1210457191. The next prime is 1210457219. The reversal of 1210457213 is 3127540121.

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 1210457213 - 2⁸ = 1210456957 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 (1210457219) 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, 86461223 + ... + 86461236.

It is an arithmetic number, because the mean of its divisors is an integer number (345844920).

Almost surely, 2^1210457213 is an apocalyptic number.

It is an amenable number.

1210457213 is a deficient number, since it is larger than the sum of its proper divisors (172922467).

1210457213 is an equidigital number, since it uses as much as digits as its factorization.

1210457213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172922466.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1210457213 is about 34791.6256159438. The cubic root of 1210457213 is about 1065.7364367233.

Adding to 1210457213 its reverse (3127540121), we get a palindrome (4337997334).

The spelling of 1210457213 in words is "one billion, two hundred ten million, four hundred fifty-seven thousand, two hundred thirteen".