1721002425 has 24 divisors (see below), whose sum is σ = 2995150560. Its totient is φ = 869558400.

The previous prime is 1721002399. The next prime is 1721002469. The reversal of 1721002425 is 5242001271.

It is not a de Polignac number, because 1721002425 - 2⁹ = 1721001913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1721002395 and 1721002404.

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, 602436 + ... + 605285.

It is an arithmetic number, because the mean of its divisors is an integer number (124797940).

Almost surely, 2^1721002425 is an apocalyptic number.

1721002425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1721002425 is a deficient number, since it is larger than the sum of its proper divisors (1274148135).

1721002425 is a wasteful number, since it uses less digits than its factorization.

1721002425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207753 (or 1207748 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 1721002425 is about 41484.9662528488. The cubic root of 1721002425 is about 1198.3779995555.

Adding to 1721002425 its reverse (5242001271), we get a palindrome (6963003696).

The spelling of 1721002425 in words is "one billion, seven hundred twenty-one million, two thousand, four hundred twenty-five".