161254605 has 16 divisors (see below), whose sum is σ = 273184704. Its totient is φ = 80943360.

The previous prime is 161254589. The next prime is 161254607. The reversal of 161254605 is 506452161.

161254605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161254605 - 2⁴ = 161254589 is a prime.

It is a super-3 number, since 3×161254605³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161254607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315931 + ... + 316440.

It is an arithmetic number, because the mean of its divisors is an integer number (17074044).

Almost surely, 2^161254605 is an apocalyptic number.

161254605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161254605 is a deficient number, since it is larger than the sum of its proper divisors (111930099).

161254605 is a wasteful number, since it uses less digits than its factorization.

161254605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632396.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 161254605 is about 12698.6064196037. The cubic root of 161254605 is about 544.2987980148.

The spelling of 161254605 in words is "one hundred sixty-one million, two hundred fifty-four thousand, six hundred five".