1020425202405 has 80 divisors (see below), whose sum is σ = 2162609032320. Its totient is φ = 450394535808.

The previous prime is 1020425202389. The next prime is 1020425202431. The reversal of 1020425202405 is 5042025240201.

1020425202405 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 4 + 252 + 0 + 2 + 405 = 666.

It is not a de Polignac number, because 1020425202405 - 2⁴ = 1020425202389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 6123619 + ... + 6288048.

It is an arithmetic number, because the mean of its divisors is an integer number (27032612904).

Almost surely, 2^{1020425202405} is an apocalyptic number.

1020425202405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020425202405 is an abundant number, since it is smaller than the sum of its proper divisors (1142183829915).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020425202405 is a wasteful number, since it uses less digits than its factorization.

1020425202405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12411720 (or 12411711 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The spelling of 1020425202405 in words is "one trillion, twenty billion, four hundred twenty-five million, two hundred two thousand, four hundred five".