161142507 has 32 divisors (see below), whose sum is σ = 253627200. Its totient is φ = 100767744.

The previous prime is 161142503. The next prime is 161142517. The reversal of 161142507 is 705241161.

It is a happy number.

161142507 is a `hidden beast` number, since 1 + 611 + 42 + 5 + 0 + 7 = 666.

It is not a de Polignac number, because 161142507 - 2² = 161142503 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (161142503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260863 + ... + 261479.

It is an arithmetic number, because the mean of its divisors is an integer number (7925850).

Almost surely, 2^161142507 is an apocalyptic number.

161142507 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

161142507 is a deficient number, since it is larger than the sum of its proper divisors (92484693).

161142507 is a wasteful number, since it uses less digits than its factorization.

161142507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212 (or 1206 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 161142507 is about 12694.1918608472. The cubic root of 161142507 is about 544.1726435803.

Adding to 161142507 its reverse (705241161), we get a palindrome (866383668).

The spelling of 161142507 in words is "one hundred sixty-one million, one hundred forty-two thousand, five hundred seven".