1025753221 has 8 divisors (see below), whose sum is σ = 1031107320. Its totient is φ = 1020411072.

The previous prime is 1025753189. The next prime is 1025753227. The reversal of 1025753221 is 1223575201.

It can be written as a sum of positive squares in 4 ways, for example, as 54184321 + 971568900 = 7361^2 + 31170^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1025753221 - 2⁵ = 1025753189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1025753221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025753227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205471 + ... + 210403.

It is an arithmetic number, because the mean of its divisors is an integer number (128888415).

Almost surely, 2^1025753221 is an apocalyptic number.

It is an amenable number.

1025753221 is a deficient number, since it is larger than the sum of its proper divisors (5354099).

1025753221 is an equidigital number, since it uses as much as digits as its factorization.

1025753221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5975.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 1025753221 is about 32027.3823625972. The cubic root of 1025753221 is about 1008.5117515274.

The spelling of 1025753221 in words is "one billion, twenty-five million, seven hundred fifty-three thousand, two hundred twenty-one".