1201869 has 6 divisors (see below), whose sum is σ = 1736046. Its totient is φ = 801240.

The previous prime is 1201853. The next prime is 1201873. The reversal of 1201869 is 9681021.

It can be written as a sum of positive squares in only one way, i.e., 1010025 + 191844 = 1005^2 + 438^2 .

It is not a de Polignac number, because 1201869 - 2⁴ = 1201853 is a prime.

It is a super-2 number, since 2×1201869² = 2888978186322, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201829) 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 5 ways as a sum of consecutive naturals, for example, 66762 + ... + 66779.

It is an arithmetic number, because the mean of its divisors is an integer number (289341).

2^1201869 is an apocalyptic number.

It is an amenable number.

1201869 is a deficient number, since it is larger than the sum of its proper divisors (534177).

1201869 is a wasteful number, since it uses less digits than its factorization.

1201869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133547 (or 133544 counting only the distinct ones).

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

The square root of 1201869 is about 1096.2978609849. The cubic root of 1201869 is about 106.3209979915.

The spelling of 1201869 in words is "one million, two hundred one thousand, eight hundred sixty-nine".