1021004 has 6 divisors (see below), whose sum is σ = 1786764. Its totient is φ = 510500.

The previous prime is 1021001. The next prime is 1021019. The reversal of 1021004 is 4001201.

1021004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1020982 and 1021000.

It is not an unprimeable number, because it can be changed into a prime (1021001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127622 + ... + 127629.

It is an arithmetic number, because the mean of its divisors is an integer number (297794).

2^1021004 is an apocalyptic number.

It is an amenable number.

1021004 is a deficient number, since it is larger than the sum of its proper divisors (765760).

1021004 is a wasteful number, since it uses less digits than its factorization.

1021004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255255 (or 255253 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1021004 is about 1010.4474256487. The cubic root of 1021004 is about 100.6952878770.

Adding to 1021004 its reverse (4001201), we get a palindrome (5022205).

The spelling of 1021004 in words is "one million, twenty-one thousand, four".