1026521420 has 24 divisors (see below), whose sum is σ = 2191036848. Its totient is φ = 403876800.

The previous prime is 1026521411. The next prime is 1026521423. The reversal of 1026521420 is 241256201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1026521423) 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, 419486 + ... + 421925.

It is an arithmetic number, because the mean of its divisors is an integer number (91293202).

Almost surely, 2^1026521420 is an apocalyptic number.

1026521420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1026521420 is an abundant number, since it is smaller than the sum of its proper divisors (1164515428).

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

1026521420 is a wasteful number, since it uses less digits than its factorization.

1026521420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841481 (or 841479 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1026521420 is about 32039.3729651502. The cubic root of 1026521420 is about 1008.7634509225.

Adding to 1026521420 its reverse (241256201), we get a palindrome (1267777621).

The spelling of 1026521420 in words is "one billion, twenty-six million, five hundred twenty-one thousand, four hundred twenty".