1285121 has 8 divisors (see below), whose sum is σ = 1349760. Its totient is φ = 1222128.

The previous prime is 1285117. The next prime is 1285129. The reversal of 1285121 is 1215821.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1285121 - 2² = 1285117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1285093 and 1285102.

It is not an unprimeable number, because it can be changed into a prime (1285129) 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, 1370 + ... + 2108.

It is an arithmetic number, because the mean of its divisors is an integer number (168720).

2^1285121 is an apocalyptic number.

It is an amenable number.

1285121 is a deficient number, since it is larger than the sum of its proper divisors (64639).

1285121 is an equidigital number, since it uses as much as digits as its factorization.

1285121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823.

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

The square root of 1285121 is about 1133.6317744312. The cubic root of 1285121 is about 108.7213092059.

The spelling of 1285121 in words is "one million, two hundred eighty-five thousand, one hundred twenty-one".