161254004 has 6 divisors (see below), whose sum is σ = 282194514. Its totient is φ = 80627000.

The previous prime is 161254001. The next prime is 161254043. The reversal of 161254004 is 400452161.

It can be written as a sum of positive squares in only one way, i.e., 88322404 + 72931600 = 9398^2 + 8540^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161254001) by changing a digit.

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, 20156747 + ... + 20156754.

It is an arithmetic number, because the mean of its divisors is an integer number (47032419).

Almost surely, 2^161254004 is an apocalyptic number.

It is an amenable number.

161254004 is a deficient number, since it is larger than the sum of its proper divisors (120940510).

161254004 is a wasteful number, since it uses less digits than its factorization.

161254004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40313505 (or 40313503 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 161254004 is about 12698.5827555676. The cubic root of 161254004 is about 544.2981218089.

The spelling of 161254004 in words is "one hundred sixty-one million, two hundred fifty-four thousand, four".