161021134 has 8 divisors (see below), whose sum is σ = 242928360. Its totient is φ = 80045016.

The previous prime is 161021131. The next prime is 161021173. The reversal of 161021134 is 431120161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161021131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232344 + ... + 233035.

It is an arithmetic number, because the mean of its divisors is an integer number (30366045).

Almost surely, 2^161021134 is an apocalyptic number.

161021134 is a deficient number, since it is larger than the sum of its proper divisors (81907226).

161021134 is a wasteful number, since it uses less digits than its factorization.

161021134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465554.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 161021134 is about 12689.4103093879. The cubic root of 161021134 is about 544.0359851304.

Adding to 161021134 its reverse (431120161), we get a palindrome (592141295).

The spelling of 161021134 in words is "one hundred sixty-one million, twenty-one thousand, one hundred thirty-four".