61243147 has 8 divisors (see below), whose sum is σ = 70092800. Its totient is φ = 52418664.

The previous prime is 61243139. The next prime is 61243183. The reversal of 61243147 is 74134216.

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

It is a cyclic number.

It is not a de Polignac number, because 61243147 - 2³ = 61243139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61240147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747 + ... + 11092.

It is an arithmetic number, because the mean of its divisors is an integer number (8761600).

Almost surely, 2^61243147 is an apocalyptic number.

61243147 is a deficient number, since it is larger than the sum of its proper divisors (8849653).

61243147 is a wasteful number, since it uses less digits than its factorization.

61243147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12585.

The product of its digits is 4032, while the sum is 28.

The square root of 61243147 is about 7825.8000868921. The cubic root of 61243147 is about 394.1720563179.

The spelling of 61243147 in words is "sixty-one million, two hundred forty-three thousand, one hundred forty-seven".