1201687 has 2 divisors, whose sum is σ = 1201688. Its totient is φ = 1201686.

The previous prime is 1201643. The next prime is 1201691. The reversal of 1201687 is 7861021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1201687 - 2⁷ = 1201559 is a prime.

1201687 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600843 + 600844.

It is an arithmetic number, because the mean of its divisors is an integer number (600844).

2^1201687 is an apocalyptic number.

1201687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201687 is an equidigital number, since it uses as much as digits as its factorization.

1201687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1201687 is about 1096.2148512039. The cubic root of 1201687 is about 106.3156309622.

The spelling of 1201687 in words is "one million, two hundred one thousand, six hundred eighty-seven".