61297205 has 4 divisors (see below), whose sum is σ = 73556652. Its totient is φ = 49037760.

The previous prime is 61297177. The next prime is 61297207. The reversal of 61297205 is 50279216.

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 42016324 + 19280881 = 6482^2 + 4391^2 .

It is not a de Polignac number, because 61297205 - 2¹⁶ = 61231669 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 (61297207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6129716 + ... + 6129725.

It is an arithmetic number, because the mean of its divisors is an integer number (18389163).

Almost surely, 2^61297205 is an apocalyptic number.

It is an amenable number.

61297205 is a deficient number, since it is larger than the sum of its proper divisors (12259447).

61297205 is a wasteful number, since it uses less digits than its factorization.

61297205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12259446.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 61297205 is about 7829.2531572303. The cubic root of 61297205 is about 394.2879979251.

The spelling of 61297205 in words is "sixty-one million, two hundred ninety-seven thousand, two hundred five".