1021240004 has 6 divisors (see below), whose sum is σ = 1787170014. Its totient is φ = 510620000.

The previous prime is 1021239977. The next prime is 1021240081. The reversal of 1021240004 is 4000421201.

It can be written as a sum of positive squares in only one way, i.e., 876278404 + 144961600 = 29602^2 + 12040^2 .

It is a super-3 number, since 3×1021240004³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127654997 + ... + 127655004.

It is an arithmetic number, because the mean of its divisors is an integer number (297861669).

Almost surely, 2^1021240004 is an apocalyptic number.

It is an amenable number.

1021240004 is a deficient number, since it is larger than the sum of its proper divisors (765930010).

1021240004 is a wasteful number, since it uses less digits than its factorization.

1021240004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255310005 (or 255310003 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1021240004 is about 31956.8459645191. The cubic root of 1021240004 is about 1007.0304581591.

Adding to 1021240004 its reverse (4000421201), we get a palindrome (5021661205).

The spelling of 1021240004 in words is "one billion, twenty-one million, two hundred forty thousand, four".