1214536685 has 4 divisors (see below), whose sum is σ = 1457444028. Its totient is φ = 971629344.

The previous prime is 1214536681. The next prime is 1214536691. The reversal of 1214536685 is 5866354121.

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 730404676 + 484132009 = 27026^2 + 22003^2 .

It is a cyclic number.

It is not a de Polignac number, because 1214536685 - 2² = 1214536681 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 (1214536681) 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, 121453664 + ... + 121453673.

It is an arithmetic number, because the mean of its divisors is an integer number (364361007).

Almost surely, 2^1214536685 is an apocalyptic number.

It is an amenable number.

1214536685 is a deficient number, since it is larger than the sum of its proper divisors (242907343).

1214536685 is an equidigital number, since it uses as much as digits as its factorization.

1214536685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242907342.

The product of its digits is 172800, while the sum is 41.

The square root of 1214536685 is about 34850.2035144703. The cubic root of 1214536685 is about 1066.9323393686.

The spelling of 1214536685 in words is "one billion, two hundred fourteen million, five hundred thirty-six thousand, six hundred eighty-five".