1025541220 has 24 divisors (see below), whose sum is σ = 2349422208. Its totient is φ = 372924000.

The previous prime is 1025541203. The next prime is 1025541259. The reversal of 1025541220 is 221455201.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1025541191 and 1025541200.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2330556 + ... + 2330995.

It is an arithmetic number, because the mean of its divisors is an integer number (97892592).

Almost surely, 2^1025541220 is an apocalyptic number.

1025541220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025541220 is an abundant number, since it is smaller than the sum of its proper divisors (1323880988).

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

1025541220 is a wasteful number, since it uses less digits than its factorization.

1025541220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4661571 (or 4661569 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1025541220 is about 32024.0725080368. The cubic root of 1025541220 is about 1008.4422675531.

Adding to 1025541220 its reverse (221455201), we get a palindrome (1246996421).

It can be divided in two parts, 1025 and 541220, that added together give a palindrome (542245).

The spelling of 1025541220 in words is "one billion, twenty-five million, five hundred forty-one thousand, two hundred twenty".