1020450205425 has 48 divisors (see below), whose sum is σ = 1929305544320. Its totient is φ = 466215575040.

The previous prime is 1020450205403. The next prime is 1020450205477. The reversal of 1020450205425 is 5245020540201.

It is not a de Polignac number, because 1020450205425 - 2¹⁸ = 1020449943281 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1020450205392 and 1020450205401.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 314781 + ... + 1462869.

Almost surely, 2^{1020450205425} is an apocalyptic number.

1020450205425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020450205425 is a deficient number, since it is larger than the sum of its proper divisors (908855338895).

1020450205425 is a wasteful number, since it uses less digits than its factorization.

1020450205425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149802 (or 1149797 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

Adding to 1020450205425 its reverse (5245020540201), we get a palindrome (6265470745626).

The spelling of 1020450205425 in words is "one trillion, twenty billion, four hundred fifty million, two hundred five thousand, four hundred twenty-five".