61436 has 6 divisors (see below), whose sum is σ = 107520. Its totient is φ = 30716.

The previous prime is 61417. The next prime is 61441. The reversal of 61436 is 63416.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 61436.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7676 + ... + 7683.

It is an arithmetic number, because the mean of its divisors is an integer number (17920).

2⁶¹⁴³⁶ is an apocalyptic number.

It is an amenable number.

61436 is a deficient number, since it is larger than the sum of its proper divisors (46084).

61436 is a wasteful number, since it uses less digits than its factorization.

61436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15363 (or 15361 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 61436 is about 247.8628653106. The cubic root of 61436 is about 39.4585368471.

Subtracting from 61436 its sum of digits (20), we obtain a palindrome (61416).

The spelling of 61436 in words is "sixty-one thousand, four hundred thirty-six".