1201005 has 24 divisors (see below), whose sum is σ = 2242968. Its totient is φ = 590976.

The previous prime is 1201003. The next prime is 1201019. The reversal of 1201005 is 5001021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21609 + 1179396 = 147^2 + 1086^2 .

It is not a de Polignac number, because 1201005 - 2¹ = 1201003 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 (1201001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 442 + ... + 1611.

It is an arithmetic number, because the mean of its divisors is an integer number (93457).

2^1201005 is an apocalyptic number.

1201005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1201005 is a deficient number, since it is larger than the sum of its proper divisors (1041963).

1201005 is a wasteful number, since it uses less digits than its factorization.

1201005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077 (or 2074 counting only the distinct ones).

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

The square root of 1201005 is about 1095.9037366484. The cubic root of 1201005 is about 106.2955145254.

Adding to 1201005 its reverse (5001021), we get a palindrome (6202026).

The spelling of 1201005 in words is "one million, two hundred one thousand, five".