1311214461 has 4 divisors (see below), whose sum is σ = 1748285952. Its totient is φ = 874142972.

The previous prime is 1311214441. The next prime is 1311214469. The reversal of 1311214461 is 1644121131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1644121131 = 3 ⋅548040377.

It is a cyclic number.

It is not a de Polignac number, because 1311214461 - 2⁶ = 1311214397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311214469) 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, 218535741 + ... + 218535746.

It is an arithmetic number, because the mean of its divisors is an integer number (437071488).

Almost surely, 2^1311214461 is an apocalyptic number.

It is an amenable number.

1311214461 is a deficient number, since it is larger than the sum of its proper divisors (437071491).

1311214461 is an equidigital number, since it uses as much as digits as its factorization.

1311214461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437071490.

The product of its digits is 576, while the sum is 24.

The square root of 1311214461 is about 36210.6953951453. The cubic root of 1311214461 is about 1094.5222051760.

Adding to 1311214461 its reverse (1644121131), we get a palindrome (2955335592).

The spelling of 1311214461 in words is "one billion, three hundred eleven million, two hundred fourteen thousand, four hundred sixty-one".