61502405 has 4 divisors (see below), whose sum is σ = 73802892. Its totient is φ = 49201920.

The previous prime is 61502393. The next prime is 61502429. The reversal of 61502405 is 50420516.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12376324 + 49126081 = 3518^2 + 7009^2 .

It is not a de Polignac number, because 61502405 - 2¹⁴ = 61486021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6150236 + ... + 6150245.

It is an arithmetic number, because the mean of its divisors is an integer number (18450723).

Almost surely, 2^61502405 is an apocalyptic number.

It is an amenable number.

61502405 is a deficient number, since it is larger than the sum of its proper divisors (12300487).

61502405 is a wasteful number, since it uses less digits than its factorization.

61502405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12300486.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 61502405 is about 7842.3469063795. The cubic root of 61502405 is about 394.7274838779.

The spelling of 61502405 in words is "sixty-one million, five hundred two thousand, four hundred five".