1210987 has 2 divisors, whose sum is σ = 1210988. Its totient is φ = 1210986.

The previous prime is 1210967. The next prime is 1210999. The reversal of 1210987 is 7890121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1210987 - 2¹¹ = 1208939 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (1210967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605493 + 605494.

It is an arithmetic number, because the mean of its divisors is an integer number (605494).

2^1210987 is an apocalyptic number.

1210987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210987 is an equidigital number, since it uses as much as digits as its factorization.

1210987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1210987 is about 1100.4485449125. The cubic root of 1210987 is about 106.5891896151.

It can be divided in two parts, 1210 and 987, that added together give a cube (2197 = 13³).

The spelling of 1210987 in words is "one million, two hundred ten thousand, nine hundred eighty-seven".