1021532425 has 12 divisors (see below), whose sum is σ = 1297596636. Its totient is φ = 797292800.

The previous prime is 1021532401. The next prime is 1021532437. The reversal of 1021532425 is 5242351201.

1021532425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 28526281 + 993006144 = 5341^2 + 31512^2 .

It is not a de Polignac number, because 1021532425 - 2¹⁵ = 1021499657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 1021532425.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 497284 + ... + 499333.

It is an arithmetic number, because the mean of its divisors is an integer number (108133053).

Almost surely, 2^1021532425 is an apocalyptic number.

It is an amenable number.

1021532425 is a deficient number, since it is larger than the sum of its proper divisors (276064211).

1021532425 is an equidigital number, since it uses as much as digits as its factorization.

1021532425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996668 (or 996663 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1021532425 is about 31961.4208851859. The cubic root of 1021532425 is about 1007.1265664034.

Adding to 1021532425 its reverse (5242351201), we get a palindrome (6263883626).

The spelling of 1021532425 in words is "one billion, twenty-one million, five hundred thirty-two thousand, four hundred twenty-five".