997145725 has 12 divisors (see below), whose sum is σ = 1257419520. Its totient is φ = 784194800.

The previous prime is 997145713. The next prime is 997145759. The reversal of 997145725 is 527541799.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-997145725 is a prime.

It is a super-3 number, since 3×997145725³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336541 + ... + 339490.

It is an arithmetic number, because the mean of its divisors is an integer number (104784960).

Almost surely, 2^997145725 is an apocalyptic number.

It is an amenable number.

997145725 is a deficient number, since it is larger than the sum of its proper divisors (260273795).

997145725 is a wasteful number, since it uses less digits than its factorization.

997145725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676100 (or 676095 counting only the distinct ones).

The product of its digits is 793800, while the sum is 49.

The square root of 997145725 is about 31577.6143019070. The cubic root of 997145725 is about 999.0476683523.

It can be divided in two parts, 9971 and 45725, that added together give a square (55696 = 236²).

The spelling of 997145725 in words is "nine hundred ninety-seven million, one hundred forty-five thousand, seven hundred twenty-five".