1206981 has 12 divisors (see below), whose sum is σ = 1808352. Its totient is φ = 804492.

The previous prime is 1206979. The next prime is 1207001. The reversal of 1206981 is 1896021.

It is not a de Polignac number, because 1206981 - 2¹ = 1206979 is a prime.

It is a super-2 number, since 2×1206981² = 2913606268722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2241 + ... + 2726.

It is an arithmetic number, because the mean of its divisors is an integer number (150696).

2^1206981 is an apocalyptic number.

It is an amenable number.

1206981 is a deficient number, since it is larger than the sum of its proper divisors (601371).

1206981 is an frugal number, since it uses more digits than its factorization.

1206981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4982 (or 4970 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1206981 is about 1098.6268702339. The cubic root of 1206981 is about 106.4715258136.

It can be divided in two parts, 1206 and 981, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1206981 in words is "one million, two hundred six thousand, nine hundred eighty-one".