1219641 has 4 divisors (see below), whose sum is σ = 1626192. Its totient is φ = 813092.

The previous prime is 1219639. The next prime is 1219643. The reversal of 1219641 is 1469121.

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.

It is an interprime number because it is at equal distance from previous prime (1219639) and next prime (1219643).

It is a cyclic number.

It is not a de Polignac number, because 1219641 - 2¹ = 1219639 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1219643) 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, 203271 + ... + 203276.

It is an arithmetic number, because the mean of its divisors is an integer number (406548).

2^1219641 is an apocalyptic number.

It is an amenable number.

1219641 is a deficient number, since it is larger than the sum of its proper divisors (406551).

1219641 is an equidigital number, since it uses as much as digits as its factorization.

1219641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406550.

The product of its digits is 432, while the sum is 24.

The square root of 1219641 is about 1104.3735780976. The cubic root of 1219641 is about 106.8424910530.

The spelling of 1219641 in words is "one million, two hundred nineteen thousand, six hundred forty-one".