161244135 has 64 divisors (see below), whose sum is σ = 312883200. Its totient is φ = 78309504.

The previous prime is 161244121. The next prime is 161244137. The reversal of 161244135 is 531442161.

It is a happy number.

161244135 is a `hidden beast` number, since 1 + 612 + 4 + 41 + 3 + 5 = 666.

It is not a de Polignac number, because 161244135 - 2⁶ = 161244071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 161244099 and 161244108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161244137) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 138064 + ... + 139226.

It is an arithmetic number, because the mean of its divisors is an integer number (4888800).

Almost surely, 2^161244135 is an apocalyptic number.

161244135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161244135 is a deficient number, since it is larger than the sum of its proper divisors (151639065).

161244135 is a wasteful number, since it uses less digits than its factorization.

161244135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269 (or 1263 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 161244135 is about 12698.1941629509. The cubic root of 161244135 is about 544.2870176138.

Adding to 161244135 its reverse (531442161), we get a palindrome (692686296).

The spelling of 161244135 in words is "one hundred sixty-one million, two hundred forty-four thousand, one hundred thirty-five".