197125621 has 32 divisors (see below), whose sum is σ = 255467520. Its totient is φ = 147614400.

The previous prime is 197125553. The next prime is 197125633. The reversal of 197125621 is 126521791.

It is a cyclic number.

It is not a de Polignac number, because 197125621 - 2⁷ = 197125493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197123621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 641950 + ... + 642256.

It is an arithmetic number, because the mean of its divisors is an integer number (7983360).

Almost surely, 2^197125621 is an apocalyptic number.

197125621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

197125621 is a deficient number, since it is larger than the sum of its proper divisors (58341899).

197125621 is a wasteful number, since it uses less digits than its factorization.

197125621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625.

The product of its digits is 7560, while the sum is 34.

The square root of 197125621 is about 14040.1431972754. The cubic root of 197125621 is about 581.9884397195.

The spelling of 197125621 in words is "one hundred ninety-seven million, one hundred twenty-five thousand, six hundred twenty-one".