1125621 has 24 divisors (see below), whose sum is σ = 1969344. Its totient is φ = 604800.

The previous prime is 1125599. The next prime is 1125629. The reversal of 1125621 is 1265211.

It is not a de Polignac number, because 1125621 - 2⁶ = 1125557 is a prime.

1125621 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1125594 and 1125603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 546 + ... + 1596.

It is an arithmetic number, because the mean of its divisors is an integer number (82056).

2^1125621 is an apocalyptic number.

It is an amenable number.

1125621 is a deficient number, since it is larger than the sum of its proper divisors (843723).

1125621 is a wasteful number, since it uses less digits than its factorization.

1125621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081 (or 1078 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 1125621 is about 1060.9528736000. The cubic root of 1125621 is about 104.0233244037.

The spelling of 1125621 in words is "one million, one hundred twenty-five thousand, six hundred twenty-one".