61142005 has 16 divisors (see below), whose sum is σ = 76982400. Its totient is φ = 46553920.

The previous prime is 61141999. The next prime is 61142017. The reversal of 61142005 is 50024116.

It is a de Polignac number, because none of the positive numbers 2^k-61142005 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 7326 + ... + 13264.

It is an arithmetic number, because the mean of its divisors is an integer number (4811400).

Almost surely, 2^61142005 is an apocalyptic number.

It is an amenable number.

61142005 is a deficient number, since it is larger than the sum of its proper divisors (15840395).

61142005 is a wasteful number, since it uses less digits than its factorization.

61142005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6044.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 61142005 is about 7819.3353298090. The cubic root of 61142005 is about 393.9549473080.

The spelling of 61142005 in words is "sixty-one million, one hundred forty-two thousand, five".