425166169 has 4 divisors (see below), whose sum is σ = 425215396. Its totient is φ = 425116944.

The previous prime is 425166167. The next prime is 425166179. The reversal of 425166169 is 961661524.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 188375625 + 236790544 = 13725^2 + 15388^2 .

It is a cyclic number.

It is not a de Polignac number, because 425166169 - 2¹ = 425166167 is a prime.

It is a super-2 number, since 2×425166169² = 361532542524273122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425166167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7854 + ... + 30199.

It is an arithmetic number, because the mean of its divisors is an integer number (106303849).

Almost surely, 2^425166169 is an apocalyptic number.

It is an amenable number.

425166169 is a deficient number, since it is larger than the sum of its proper divisors (49227).

425166169 is a wasteful number, since it uses less digits than its factorization.

425166169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49226.

The product of its digits is 77760, while the sum is 40.

The square root of 425166169 is about 20619.5579244561. The cubic root of 425166169 is about 751.9452725611.

The spelling of 425166169 in words is "four hundred twenty-five million, one hundred sixty-six thousand, one hundred sixty-nine".