61261143 has 8 divisors (see below), whose sum is σ = 82832256. Its totient is φ = 40265400.

The previous prime is 61261097. The next prime is 61261157. The reversal of 61261143 is 34116216.

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

It is not a de Polignac number, because 61261143 - 2¹³ = 61252951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61261943) 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, 143593 + ... + 144018.

It is an arithmetic number, because the mean of its divisors is an integer number (10354032).

Almost surely, 2^61261143 is an apocalyptic number.

61261143 is a deficient number, since it is larger than the sum of its proper divisors (21571113).

61261143 is a wasteful number, since it uses less digits than its factorization.

61261143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287685.

The product of its digits is 864, while the sum is 24.

The square root of 61261143 is about 7826.9497890302. The cubic root of 61261143 is about 394.2106610489.

Adding to 61261143 its reverse (34116216), we get a palindrome (95377359).

The spelling of 61261143 in words is "sixty-one million, two hundred sixty-one thousand, one hundred forty-three".