161254013 has 4 divisors (see below), whose sum is σ = 161340480. Its totient is φ = 161167548.

The previous prime is 161254001. The next prime is 161254043. The reversal of 161254013 is 310452161.

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: 310452161 = 1039 ⋅298799.

It is a cyclic number.

It is not a de Polignac number, because 161254013 - 2¹⁸ = 160991869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 161254013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161254043) 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, 40373 + ... + 44186.

It is an arithmetic number, because the mean of its divisors is an integer number (40335120).

Almost surely, 2^161254013 is an apocalyptic number.

It is an amenable number.

161254013 is a deficient number, since it is larger than the sum of its proper divisors (86467).

161254013 is an equidigital number, since it uses as much as digits as its factorization.

161254013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86466.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 161254013 is about 12698.5831099379. The cubic root of 161254013 is about 544.2981319351.

The spelling of 161254013 in words is "one hundred sixty-one million, two hundred fifty-four thousand, thirteen".