161420635 has 8 divisors (see below), whose sum is σ = 195881760. Its totient is φ = 127685184.

The previous prime is 161420617. The next prime is 161420639. The reversal of 161420635 is 536024161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161420635 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161420639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180927 + ... + 181816.

It is an arithmetic number, because the mean of its divisors is an integer number (24485220).

Almost surely, 2^161420635 is an apocalyptic number.

161420635 is a deficient number, since it is larger than the sum of its proper divisors (34461125).

161420635 is an equidigital number, since it uses as much as digits as its factorization.

161420635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362837.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 161420635 is about 12705.1420692568. The cubic root of 161420635 is about 544.4855398276.

Adding to 161420635 its reverse (536024161), we get a palindrome (697444796).

The spelling of 161420635 in words is "one hundred sixty-one million, four hundred twenty thousand, six hundred thirty-five".