1125021 has 8 divisors (see below), whose sum is σ = 1548544. Its totient is φ = 725760.

The previous prime is 1125017. The next prime is 1125029. The reversal of 1125021 is 1205211.

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

It is not a de Polignac number, because 1125021 - 2² = 1125017 is a prime.

It is a Duffinian number.

It is a Curzon number.

1125021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1124988 and 1125006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125029) 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, 5956 + ... + 6141.

It is an arithmetic number, because the mean of its divisors is an integer number (193568).

2^1125021 is an apocalyptic number.

It is an amenable number.

1125021 is a deficient number, since it is larger than the sum of its proper divisors (423523).

1125021 is a wasteful number, since it uses less digits than its factorization.

1125021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12131.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 1125021 is about 1060.6700712286. The cubic root of 1125021 is about 104.0048382858.

The spelling of 1125021 in words is "one million, one hundred twenty-five thousand, twenty-one".