1205001 has 24 divisors (see below), whose sum is σ = 2056704. Its totient is φ = 665280.

The previous prime is 1204981. The next prime is 1205027. The reversal of 1205001 is 1005021.

It is a happy number.

It is not a de Polignac number, because 1205001 - 2⁵ = 1204969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1645 + ... + 2261.

It is an arithmetic number, because the mean of its divisors is an integer number (85696).

2^1205001 is an apocalyptic number.

It is an amenable number.

1205001 is a deficient number, since it is larger than the sum of its proper divisors (851703).

1205001 is a wasteful number, since it uses less digits than its factorization.

1205001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 1205001 is about 1097.7253754924. The cubic root of 1205001 is about 106.4132733078.

The spelling of 1205001 in words is "one million, two hundred five thousand, one".