1220901 has 8 divisors (see below), whose sum is σ = 1775904. Its totient is φ = 739920.

The previous prime is 1220897. The next prime is 1220903. The reversal of 1220901 is 1090221.

It is a happy number.

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

It is not a de Polignac number, because 1220901 - 2² = 1220897 is a prime.

1220901 is a lucky number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18466 + ... + 18531.

It is an arithmetic number, because the mean of its divisors is an integer number (221988).

2^1220901 is an apocalyptic number.

1220901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220901 is a deficient number, since it is larger than the sum of its proper divisors (555003).

1220901 is a wasteful number, since it uses less digits than its factorization.

1220901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37011.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1220901 is about 1104.9438899781. The cubic root of 1220901 is about 106.8792710581.

The spelling of 1220901 in words is "one million, two hundred twenty thousand, nine hundred one".