1212986 has 4 divisors (see below), whose sum is σ = 1819482. Its totient is φ = 606492.

The previous prime is 1212973. The next prime is 1212989. The reversal of 1212986 is 6892121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6892121 = 431 ⋅15991.

It can be written as a sum of positive squares in only one way, i.e., 1142761 + 70225 = 1069^2 + 265^2 .

It is not an unprimeable number, because it can be changed into a prime (1212989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303245 + ... + 303248.

2^1212986 is an apocalyptic number.

1212986 is a deficient number, since it is larger than the sum of its proper divisors (606496).

1212986 is an equidigital number, since it uses as much as digits as its factorization.

1212986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606495.

The product of its digits is 1728, while the sum is 29.

The square root of 1212986 is about 1101.3564364001. The cubic root of 1212986 is about 106.6478069955.

The spelling of 1212986 in words is "one million, two hundred twelve thousand, nine hundred eighty-six".