1720606425 has 24 divisors (see below), whose sum is σ = 2968423104. Its totient is φ = 877757760.

The previous prime is 1720606417. The next prime is 1720606487. The reversal of 1720606425 is 5246060271.

It is not a de Polignac number, because 1720606425 - 2³ = 1720606417 is a prime.

It is a Curzon number.

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, 497002 + ... + 500451.

It is an arithmetic number, because the mean of its divisors is an integer number (123684296).

Almost surely, 2^1720606425 is an apocalyptic number.

1720606425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1720606425 is a deficient number, since it is larger than the sum of its proper divisors (1247816679).

1720606425 is a wasteful number, since it uses less digits than its factorization.

1720606425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997489 (or 997484 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 1720606425 is about 41480.1931649311. The cubic root of 1720606425 is about 1198.2860775291.

Adding to 1720606425 its reverse (5246060271), we get a palindrome (6966666696).

The spelling of 1720606425 in words is "one billion, seven hundred twenty million, six hundred six thousand, four hundred twenty-five".