161126242 has 4 divisors (see below), whose sum is σ = 241689366. Its totient is φ = 80563120.

The previous prime is 161126239. The next prime is 161126249. The reversal of 161126242 is 242621161.

It is a happy number.

161126242 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242621161 = 17 ⋅14271833.

It can be written as a sum of positive squares in only one way, i.e., 152547201 + 8579041 = 12351^2 + 2929^2 .

It is a super-2 number, since 2×161126242² = 51923331722085128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161126249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40281559 + ... + 40281562.

Almost surely, 2^161126242 is an apocalyptic number.

161126242 is a deficient number, since it is larger than the sum of its proper divisors (80563124).

161126242 is an equidigital number, since it uses as much as digits as its factorization.

161126242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80563123.

The product of its digits is 1152, while the sum is 25.

The square root of 161126242 is about 12693.5511973600. The cubic root of 161126242 is about 544.1543341845.

The spelling of 161126242 in words is "one hundred sixty-one million, one hundred twenty-six thousand, two hundred forty-two".