1223131 has 8 divisors (see below), whose sum is σ = 1505504. Its totient is φ = 967680.

The previous prime is 1223119. The next prime is 1223149. The reversal of 1223131 is 1313221.

1223131 = 449² + 450² + ... + 454².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1223131 - 2⁷ = 1223003 is a prime.

It is a super-2 number, since 2×1223131² = 2992098886322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (1223161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6630 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (188188).

2^1223131 is an apocalyptic number.

1223131 is a deficient number, since it is larger than the sum of its proper divisors (282373).

1223131 is a wasteful number, since it uses less digits than its factorization.

1223131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13461.

The product of its digits is 36, while the sum is 13.

The square root of 1223131 is about 1105.9525306269. The cubic root of 1223131 is about 106.9443038522.

Adding to 1223131 its reverse (1313221), we get a palindrome (2536352).

The spelling of 1223131 in words is "one million, two hundred twenty-three thousand, one hundred thirty-one".