1222381 has 4 divisors (see below), whose sum is σ = 1275552. Its totient is φ = 1169212.

The previous prime is 1222373. The next prime is 1222393. The reversal of 1222381 is 1832221.

1222381 = T₅₈ + T₅₉ + ... + T₁₉₅.

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 a cyclic number.

It is not a de Polignac number, because 1222381 - 2³ = 1222373 is a prime.

It is a super-2 number, since 2×1222381² = 2988430618322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222681) 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, 26551 + ... + 26596.

It is an arithmetic number, because the mean of its divisors is an integer number (318888).

2^1222381 is an apocalyptic number.

It is an amenable number.

1222381 is a deficient number, since it is larger than the sum of its proper divisors (53171).

1222381 is an equidigital number, since it uses as much as digits as its factorization.

1222381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53170.

The product of its digits is 192, while the sum is 19.

The square root of 1222381 is about 1105.6134044050. The cubic root of 1222381 is about 106.9224406646.

The spelling of 1222381 in words is "one million, two hundred twenty-two thousand, three hundred eighty-one".