61409245 has 16 divisors (see below), whose sum is σ = 75887280. Its totient is φ = 47683584.

The previous prime is 61409221. The next prime is 61409251. The reversal of 61409245 is 54290416.

It can be written as a sum of positive squares in 8 ways, for example, as 974169 + 60435076 = 987^2 + 7774^2 .

It is a cyclic number.

It is not a de Polignac number, because 61409245 - 2⁹ = 61408733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24511 + ... + 26899.

It is an arithmetic number, because the mean of its divisors is an integer number (4742955).

Almost surely, 2^61409245 is an apocalyptic number.

It is an amenable number.

61409245 is a deficient number, since it is larger than the sum of its proper divisors (14478035).

61409245 is a wasteful number, since it uses less digits than its factorization.

61409245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 61409245 is about 7836.4051069352. The cubic root of 61409245 is about 394.5280803203.

The spelling of 61409245 in words is "sixty-one million, four hundred nine thousand, two hundred forty-five".