1228131 has 24 divisors (see below), whose sum is σ = 1965600. Its totient is φ = 734976.

The previous prime is 1228109. The next prime is 1228133. The reversal of 1228131 is 1318221.

It is not a de Polignac number, because 1228131 - 2⁵ = 1228099 is a prime.

It is a super-2 number, since 2×1228131² = 3016611506322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228133) 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, 3345 + ... + 3693.

It is an arithmetic number, because the mean of its divisors is an integer number (81900).

2^1228131 is an apocalyptic number.

1228131 is a deficient number, since it is larger than the sum of its proper divisors (737469).

1228131 is a wasteful number, since it uses less digits than its factorization.

1228131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 392 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 1228131 is about 1108.2107200348. The cubic root of 1228131 is about 107.0898305226.

The spelling of 1228131 in words is "one million, two hundred twenty-eight thousand, one hundred thirty-one".