61406 has 4 divisors (see below), whose sum is σ = 92112. Its totient is φ = 30702.

The previous prime is 61403. The next prime is 61409. The reversal of 61406 is 60416.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (61403) and next prime (61409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61403) by changing a digit.

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, 15350 + ... + 15353.

It is an arithmetic number, because the mean of its divisors is an integer number (23028).

2⁶¹⁴⁰⁶ is an apocalyptic number.

61406 is a deficient number, since it is larger than the sum of its proper divisors (30706).

61406 is a wasteful number, since it uses less digits than its factorization.

61406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30705.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 61406 is about 247.8023405862. The cubic root of 61406 is about 39.4521130953.

Subtracting from 61406 its reverse (60416), we obtain a triangular number (990 = T₄₄).

The spelling of 61406 in words is "sixty-one thousand, four hundred six".