1021650325 has 12 divisors (see below), whose sum is σ = 1273416388. Its totient is φ = 813081600.

The previous prime is 1021650323. The next prime is 1021650347. The reversal of 1021650325 is 5230561201.

It can be written as a sum of positive squares in 6 ways, for example, as 2380849 + 1019269476 = 1543^2 + 31926^2 .

It is not a de Polignac number, because 1021650325 - 2¹ = 1021650323 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 1021650325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021650323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101046 + ... + 110695.

Almost surely, 2^1021650325 is an apocalyptic number.

It is an amenable number.

1021650325 is a deficient number, since it is larger than the sum of its proper divisors (251766063).

1021650325 is a wasteful number, since it uses less digits than its factorization.

1021650325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211944 (or 211939 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1021650325 is about 31963.2652430880. The cubic root of 1021650325 is about 1007.1653106963.

The spelling of 1021650325 in words is "one billion, twenty-one million, six hundred fifty thousand, three hundred twenty-five".