161245427 has 6 divisors (see below), whose sum is σ = 187571268. Its totient is φ = 138210324.

The previous prime is 161245417. The next prime is 161245439. The reversal of 161245427 is 724542161.

It is not a de Polignac number, because 161245427 - 2¹⁰ = 161244403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161245393 and 161245402.

It is not an unprimeable number, because it can be changed into a prime (161245417) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1645313 + ... + 1645410.

It is an arithmetic number, because the mean of its divisors is an integer number (31261878).

Almost surely, 2^161245427 is an apocalyptic number.

161245427 is a deficient number, since it is larger than the sum of its proper divisors (26325841).

161245427 is an equidigital number, since it uses as much as digits as its factorization.

161245427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3290737 (or 3290730 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 161245427 is about 12698.2450362245. The cubic root of 161245427 is about 544.2884713451.

Adding to 161245427 its reverse (724542161), we get a palindrome (885787588).

The spelling of 161245427 in words is "one hundred sixty-one million, two hundred forty-five thousand, four hundred twenty-seven".