1228151 has 4 divisors (see below), whose sum is σ = 1243032. Its totient is φ = 1213272.

The previous prime is 1228147. The next prime is 1228153. The reversal of 1228151 is 1518221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1228151 - 2² = 1228147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228153) 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, 7316 + ... + 7481.

It is an arithmetic number, because the mean of its divisors is an integer number (310758).

2^1228151 is an apocalyptic number.

1228151 is a deficient number, since it is larger than the sum of its proper divisors (14881).

1228151 is an equidigital number, since it uses as much as digits as its factorization.

1228151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14880.

The product of its digits is 160, while the sum is 20.

The square root of 1228151 is about 1108.2197435527. The cubic root of 1228151 is about 107.0904118354.

The spelling of 1228151 in words is "one million, two hundred twenty-eight thousand, one hundred fifty-one".