61406405 has 8 divisors (see below), whose sum is σ = 74268672. Its totient is φ = 48737808.

The previous prime is 61406377. The next prime is 61406407. The reversal of 61406405 is 50460416.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61406405 - 2¹⁰ = 61405381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61406407) 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, 47717 + ... + 48986.

It is an arithmetic number, because the mean of its divisors is an integer number (9283584).

Almost surely, 2^61406405 is an apocalyptic number.

It is an amenable number.

61406405 is a deficient number, since it is larger than the sum of its proper divisors (12862267).

61406405 is a wasteful number, since it uses less digits than its factorization.

61406405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96835.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 61406405 is about 7836.2238993025. The cubic root of 61406405 is about 394.5219982989.

The spelling of 61406405 in words is "sixty-one million, four hundred six thousand, four hundred five".