161210004 has 12 divisors (see below), whose sum is σ = 376156704. Its totient is φ = 53736664.

The previous prime is 161209969. The next prime is 161210011. The reversal of 161210004 is 400012161.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6717072 + ... + 6717095.

It is an arithmetic number, because the mean of its divisors is an integer number (31346392).

Almost surely, 2^161210004 is an apocalyptic number.

It is an amenable number.

161210004 is an abundant number, since it is smaller than the sum of its proper divisors (214946700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161210004 is a wasteful number, since it uses less digits than its factorization.

161210004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13434174 (or 13434172 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 161210004 is about 12696.8501605713. The cubic root of 161210004 is about 544.2486113153.

Adding to 161210004 its reverse (400012161), we get a palindrome (561222165).

The spelling of 161210004 in words is "one hundred sixty-one million, two hundred ten thousand, four".