61239245 has 8 divisors (see below), whose sum is σ = 73774584. Its totient is φ = 48799744.

The previous prime is 61239239. The next prime is 61239251. The reversal of 61239245 is 54293216.

61239245 = 5533² + 5534².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61239239) and next prime (61239251).

It can be written as a sum of positive squares in 4 ways, for example, as 30614089 + 30625156 = 5533^2 + 5534^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61239245 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22544 + ... + 25113.

It is an arithmetic number, because the mean of its divisors is an integer number (9221823).

Almost surely, 2^61239245 is an apocalyptic number.

61239245 is the 5534-th centered square number.

It is an amenable number.

61239245 is a deficient number, since it is larger than the sum of its proper divisors (12535339).

61239245 is a wasteful number, since it uses less digits than its factorization.

61239245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47919.

The product of its digits is 12960, while the sum is 32.

The square root of 61239245 is about 7825.5507793382. The cubic root of 61239245 is about 394.1636848124.

The spelling of 61239245 in words is "sixty-one million, two hundred thirty-nine thousand, two hundred forty-five".