1021603425 has 24 divisors (see below), whose sum is σ = 1709411424. Its totient is φ = 538287360.

The previous prime is 1021603403. The next prime is 1021603441. The reversal of 1021603425 is 5243061201.

It is not a de Polignac number, because 1021603425 - 2⁶ = 1021603361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021603395 and 1021603404.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75832 + ... + 88281.

It is an arithmetic number, because the mean of its divisors is an integer number (71225476).

Almost surely, 2^1021603425 is an apocalyptic number.

1021603425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021603425 is a deficient number, since it is larger than the sum of its proper divisors (687807999).

1021603425 is a wasteful number, since it uses less digits than its factorization.

1021603425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164209 (or 164204 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1021603425 is about 31962.5315799609. The cubic root of 1021603425 is about 1007.1498987774.

Adding to 1021603425 its reverse (5243061201), we get a palindrome (6264664626).

The spelling of 1021603425 in words is "one billion, twenty-one million, six hundred three thousand, four hundred twenty-five".