1725613421 has 8 divisors (see below), whose sum is σ = 2075926080. Its totient is φ = 1401249888.

The previous prime is 1725613403. The next prime is 1725613447. The reversal of 1725613421 is 1243165271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1725613421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1725613321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6487136 + ... + 6487401.

It is an arithmetic number, because the mean of its divisors is an integer number (259490760).

Almost surely, 2^1725613421 is an apocalyptic number.

It is an amenable number.

1725613421 is a deficient number, since it is larger than the sum of its proper divisors (350312659).

1725613421 is a wasteful number, since it uses less digits than its factorization.

1725613421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12974563.

The product of its digits is 10080, while the sum is 32.

The square root of 1725613421 is about 41540.5033792322. The cubic root of 1725613421 is about 1199.4472966290.

Adding to 1725613421 its reverse (1243165271), we get a palindrome (2968778692).

The spelling of 1725613421 in words is "one billion, seven hundred twenty-five million, six hundred thirteen thousand, four hundred twenty-one".