1220995 has 4 divisors (see below), whose sum is σ = 1465200. Its totient is φ = 976792.

The previous prime is 1220993. The next prime is 1221019. The reversal of 1220995 is 5990221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220995 - 2¹ = 1220993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122095 + ... + 122104.

It is an arithmetic number, because the mean of its divisors is an integer number (366300).

2^1220995 is an apocalyptic number.

1220995 is a deficient number, since it is larger than the sum of its proper divisors (244205).

1220995 is an equidigital number, since it uses as much as digits as its factorization.

1220995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244204.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1220995 is about 1104.9864252560. The cubic root of 1220995 is about 106.8820139487.

The spelling of 1220995 in words is "one million, two hundred twenty thousand, nine hundred ninety-five".