161421014 has 4 divisors (see below), whose sum is σ = 242131524. Its totient is φ = 80710506.

The previous prime is 161420993. The next prime is 161421041. The reversal of 161421014 is 410124161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 410124161 = 6481 ⋅63281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40355252 + ... + 40355255.

It is an arithmetic number, because the mean of its divisors is an integer number (60532881).

Almost surely, 2^161421014 is an apocalyptic number.

161421014 is a deficient number, since it is larger than the sum of its proper divisors (80710510).

161421014 is an equidigital number, since it uses as much as digits as its factorization.

161421014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80710509.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 161421014 is about 12705.1569844689. The cubic root of 161421014 is about 544.4859659604.

Adding to 161421014 its reverse (410124161), we get a palindrome (571545175).

The spelling of 161421014 in words is "one hundred sixty-one million, four hundred twenty-one thousand, fourteen".