161242803 has 12 divisors (see below), whose sum is σ = 236383368. Its totient is φ = 105890400.

The previous prime is 161242799. The next prime is 161242831. The reversal of 161242803 is 308242161.

161242803 is a `hidden beast` number, since 1 + 612 + 42 + 8 + 0 + 3 = 666.

It is not a de Polignac number, because 161242803 - 2² = 161242799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161241803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133098 + ... + 134303.

It is an arithmetic number, because the mean of its divisors is an integer number (19698614).

Almost surely, 2^161242803 is an apocalyptic number.

161242803 is a deficient number, since it is larger than the sum of its proper divisors (75140565).

161242803 is a wasteful number, since it uses less digits than its factorization.

161242803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267474 (or 267471 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 161242803 is about 12698.1417144400. The cubic root of 161242803 is about 544.2855188672.

Adding to 161242803 its reverse (308242161), we get a palindrome (469484964).

The spelling of 161242803 in words is "one hundred sixty-one million, two hundred forty-two thousand, eight hundred three".