61352145 has 12 divisors (see below), whose sum is σ = 106343796. Its totient is φ = 32721120.

The previous prime is 61352143. The next prime is 61352171. The reversal of 61352145 is 54125316.

61352145 is a `hidden beast` number, since 613 + 5 + 2 + 1 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6843456 + 54508689 = 2616^2 + 7383^2 .

It is not a de Polignac number, because 61352145 - 2¹ = 61352143 is a prime.

It is a super-2 number, since 2×61352145² = 7528171392202050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61352143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 681646 + ... + 681735.

It is an arithmetic number, because the mean of its divisors is an integer number (8861983).

Almost surely, 2^61352145 is an apocalyptic number.

It is an amenable number.

61352145 is a deficient number, since it is larger than the sum of its proper divisors (44991651).

61352145 is a wasteful number, since it uses less digits than its factorization.

61352145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363392 (or 1363389 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 61352145 is about 7832.7610074609. The cubic root of 61352145 is about 394.4057613912.

The spelling of 61352145 in words is "sixty-one million, three hundred fifty-two thousand, one hundred forty-five".