1228137 has 4 divisors (see below), whose sum is σ = 1637520. Its totient is φ = 818756.

The previous prime is 1228133. The next prime is 1228147. The reversal of 1228137 is 7318221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7318221 = 3 ⋅2439407.

It is a cyclic number.

It is not a de Polignac number, because 1228137 - 2² = 1228133 is a prime.

It is a D-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 3 ways as a sum of consecutive naturals, for example, 204687 + ... + 204692.

It is an arithmetic number, because the mean of its divisors is an integer number (409380).

2^1228137 is an apocalyptic number.

It is an amenable number.

1228137 is a deficient number, since it is larger than the sum of its proper divisors (409383).

1228137 is an equidigital number, since it uses as much as digits as its factorization.

1228137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409382.

The product of its digits is 672, while the sum is 24.

The square root of 1228137 is about 1108.2134270979. The cubic root of 1228137 is about 107.0900049171.

The spelling of 1228137 in words is "one million, two hundred twenty-eight thousand, one hundred thirty-seven".