1218801 has 4 divisors (see below), whose sum is σ = 1625072. Its totient is φ = 812532.

The previous prime is 1218787. The next prime is 1218821. The reversal of 1218801 is 1088121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1088121 = 3 ⋅362707.

It is not a de Polignac number, because 1218801 - 2¹³ = 1210609 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1218821) 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, 203131 + ... + 203136.

It is an arithmetic number, because the mean of its divisors is an integer number (406268).

2^1218801 is an apocalyptic number.

It is an amenable number.

1218801 is a deficient number, since it is larger than the sum of its proper divisors (406271).

1218801 is an equidigital number, since it uses as much as digits as its factorization.

1218801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406270.

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 1218801 is about 1103.9932065008. The cubic root of 1218801 is about 106.8179569744.

The spelling of 1218801 in words is "one million, two hundred eighteen thousand, eight hundred one".