161241377 has 4 divisors (see below), whose sum is σ = 175899696. Its totient is φ = 146583060.

The previous prime is 161241373. The next prime is 161241401. The reversal of 161241377 is 773142161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 773142161 = 11 ⋅70285651.

It is a cyclic number.

It is not a de Polignac number, because 161241377 - 2² = 161241373 is a prime.

It is a super-2 number, since 2×161241377² = 51997563313712258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161241373) 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, 7329143 + ... + 7329164.

It is an arithmetic number, because the mean of its divisors is an integer number (43974924).

Almost surely, 2^161241377 is an apocalyptic number.

It is an amenable number.

161241377 is a deficient number, since it is larger than the sum of its proper divisors (14658319).

161241377 is a wasteful number, since it uses less digits than its factorization.

161241377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14658318.

The product of its digits is 7056, while the sum is 32.

The square root of 161241377 is about 12698.0855643676. The cubic root of 161241377 is about 544.2839143440.

The spelling of 161241377 in words is "one hundred sixty-one million, two hundred forty-one thousand, three hundred seventy-seven".