161245454 has 4 divisors (see below), whose sum is σ = 241868184. Its totient is φ = 80622726.

The previous prime is 161245439. The next prime is 161245499. The reversal of 161245454 is 454542161.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×161245454² = 52000192871332232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161245454.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40311362 + ... + 40311365.

It is an arithmetic number, because the mean of its divisors is an integer number (60467046).

Almost surely, 2^161245454 is an apocalyptic number.

161245454 is a deficient number, since it is larger than the sum of its proper divisors (80622730).

161245454 is an equidigital number, since it uses as much as digits as its factorization.

161245454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80622729.

The product of its digits is 19200, while the sum is 32.

The square root of 161245454 is about 12698.2460993635. The cubic root of 161245454 is about 544.2885017248.

The spelling of 161245454 in words is "one hundred sixty-one million, two hundred forty-five thousand, four hundred fifty-four".