61457143 has 8 divisors (see below), whose sum is σ = 67660560. Its totient is φ = 55356480.

The previous prime is 61457117. The next prime is 61457147. The reversal of 61457143 is 34175416.

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 61457143 - 2⁹ = 61456631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61457147) 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, 24430 + ... + 26827.

It is an arithmetic number, because the mean of its divisors is an integer number (8457570).

Almost surely, 2^61457143 is an apocalyptic number.

61457143 is a deficient number, since it is larger than the sum of its proper divisors (6203417).

61457143 is a wasteful number, since it uses less digits than its factorization.

61457143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51377.

The product of its digits is 10080, while the sum is 31.

The square root of 61457143 is about 7839.4606319568. The cubic root of 61457143 is about 394.6306283703.

The spelling of 61457143 in words is "sixty-one million, four hundred fifty-seven thousand, one hundred forty-three".