161441004 has 24 divisors (see below), whose sum is σ = 376983040. Its totient is φ = 53772624.

The previous prime is 161440991. The next prime is 161441017. The reversal of 161441004 is 400144161.

It is an interprime number because it is at equal distance from previous prime (161440991) and next prime (161441017).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14157 + ... + 22875.

Almost surely, 2^161441004 is an apocalyptic number.

It is an amenable number.

161441004 is an abundant number, since it is smaller than the sum of its proper divisors (215542036).

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

161441004 is a wasteful number, since it uses less digits than its factorization.

161441004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10269 (or 10267 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 161441004 is about 12705.9436485450. The cubic root of 161441004 is about 544.5084409879.

Adding to 161441004 its reverse (400144161), we get a palindrome (561585165).

The spelling of 161441004 in words is "one hundred sixty-one million, four hundred forty-one thousand, four".