1209955 has 8 divisors (see below), whose sum is σ = 1468800. Its totient is φ = 956736.

The previous prime is 1209947. The next prime is 1209959. The reversal of 1209955 is 5599021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1209955 - 2³ = 1209947 is a prime.

It is a super-2 number, since 2×1209955² = 2927982204050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1209959) 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 7 ways as a sum of consecutive naturals, for example, 915 + ... + 1804.

It is an arithmetic number, because the mean of its divisors is an integer number (183600).

2^1209955 is an apocalyptic number.

1209955 is a deficient number, since it is larger than the sum of its proper divisors (258845).

1209955 is an equidigital number, since it uses as much as digits as its factorization.

1209955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 1209955 is about 1099.9795452644. The cubic root of 1209955 is about 106.5589026658.

The spelling of 1209955 in words is "one million, two hundred nine thousand, nine hundred fifty-five".