1221093 has 24 divisors (see below), whose sum is σ = 1954368. Its totient is φ = 730752.

The previous prime is 1221089. The next prime is 1221097. The reversal of 1221093 is 3901221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1221089) and next prime (1221097).

It is not a de Polignac number, because 1221093 - 2² = 1221089 is a prime.

It is a super-2 number, since 2×1221093² = 2982136229298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3346 + ... + 3692.

It is an arithmetic number, because the mean of its divisors is an integer number (81432).

2^1221093 is an apocalyptic number.

It is an amenable number.

1221093 is a deficient number, since it is larger than the sum of its proper divisors (733275).

1221093 is a wasteful number, since it uses less digits than its factorization.

1221093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1221093 is about 1105.0307688024. The cubic root of 1221093 is about 106.8848734081.

It can be divided in two parts, 12 and 21093, that multiplied together give a triangular number (253116 = T₇₁₁).

The spelling of 1221093 in words is "one million, two hundred twenty-one thousand, ninety-three".