1021040424 has 64 divisors (see below), whose sum is σ = 2838873600. Its totient is φ = 340028928.

The previous prime is 1021040399. The next prime is 1021040431. The reversal of 1021040424 is 4240401201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1021040397 and 1021040406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392472 + ... + 395064.

It is an arithmetic number, because the mean of its divisors is an integer number (44357400).

Almost surely, 2^1021040424 is an apocalyptic number.

It is an amenable number.

1021040424 is an abundant number, since it is smaller than the sum of its proper divisors (1817833176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021040424 is a wasteful number, since it uses less digits than its factorization.

1021040424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4431 (or 4421 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1021040424 is about 31953.7231633498. The cubic root of 1021040424 is about 1006.9648528714.

Adding to 1021040424 its reverse (4240401201), we get a palindrome (5261441625).

The spelling of 1021040424 in words is "one billion, twenty-one million, forty thousand, four hundred twenty-four".