361645 has 8 divisors (see below), whose sum is σ = 437760. Its totient is φ = 286800.

The previous prime is 361643. The next prime is 361649. The reversal of 361645 is 546163.

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

It is not a de Polignac number, because 361645 - 2¹ = 361643 is a prime.

It is a super-3 number, since 3×361645³ = 141895508875233375, which contains 333 as substring.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361643) 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, 516 + ... + 994.

It is an arithmetic number, because the mean of its divisors is an integer number (54720).

2³⁶¹⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

361645 is a deficient number, since it is larger than the sum of its proper divisors (76115).

361645 is a wasteful number, since it uses less digits than its factorization.

361645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635.

The product of its digits is 2160, while the sum is 25.

The square root of 361645 is about 601.3692709143. The cubic root of 361645 is about 71.2460549780.

It can be divided in two parts, 36 and 1645, that added together give a square (1681 = 41²).

The spelling of 361645 in words is "three hundred sixty-one thousand, six hundred forty-five".