196721425 has 12 divisors (see below), whose sum is σ = 248538780. Its totient is φ = 154406720.

The previous prime is 196721423. The next prime is 196721449. The reversal of 196721425 is 524127691.

It can be written as a sum of positive squares in 6 ways, for example, as 3594816 + 193126609 = 1896^2 + 13897^2 .

It is not a de Polignac number, because 196721425 - 2¹ = 196721423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (196721423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72910 + ... + 75559.

It is an arithmetic number, because the mean of its divisors is an integer number (20711565).

Almost surely, 2^196721425 is an apocalyptic number.

It is an amenable number.

196721425 is a deficient number, since it is larger than the sum of its proper divisors (51817355).

196721425 is a wasteful number, since it uses less digits than its factorization.

196721425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148532 (or 148527 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 196721425 is about 14025.7415133746. The cubic root of 196721425 is about 581.5903883613.

The spelling of 196721425 in words is "one hundred ninety-six million, seven hundred twenty-one thousand, four hundred twenty-five".