61372143 has 12 divisors (see below), whose sum is σ = 101312848. Its totient is φ = 35069760.

The previous prime is 61372139. The next prime is 61372153. The reversal of 61372143 is 34127316.

61372143 is a `hidden beast` number, since 613 + 7 + 2 + 1 + 43 = 666.

It is not a de Polignac number, because 61372143 - 2² = 61372139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61372153) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 487018 + ... + 487143.

Almost surely, 2^61372143 is an apocalyptic number.

61372143 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

61372143 is a deficient number, since it is larger than the sum of its proper divisors (39940705).

61372143 is a wasteful number, since it uses less digits than its factorization.

61372143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974174 (or 974171 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 61372143 is about 7834.0374648070. The cubic root of 61372143 is about 394.4486094970.

Adding to 61372143 its reverse (34127316), we get a palindrome (95499459).

The spelling of 61372143 in words is "sixty-one million, three hundred seventy-two thousand, one hundred forty-three".