1725420997 has 4 divisors (see below), whose sum is σ = 1726958560. Its totient is φ = 1723883436.

The previous prime is 1725420973. The next prime is 1725421013. The reversal of 1725420997 is 7990245271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1725420997 - 2⁷ = 1725420869 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 (1725420947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767097 + ... + 769342.

It is an arithmetic number, because the mean of its divisors is an integer number (431739640).

Almost surely, 2^1725420997 is an apocalyptic number.

It is an amenable number.

1725420997 is a deficient number, since it is larger than the sum of its proper divisors (1537563).

1725420997 is a wasteful number, since it uses less digits than its factorization.

1725420997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537562.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 1725420997 is about 41538.1872136953. The cubic root of 1725420997 is about 1199.4027113193.

The spelling of 1725420997 in words is "one billion, seven hundred twenty-five million, four hundred twenty thousand, nine hundred ninety-seven".