61871142 has 16 divisors (see below), whose sum is σ = 124186032. Its totient is φ = 20549760.

The previous prime is 61871119. The next prime is 61871167. The reversal of 61871142 is 24117816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16663 + ... + 20034.

It is an arithmetic number, because the mean of its divisors is an integer number (7761627).

Almost surely, 2^61871142 is an apocalyptic number.

61871142 is an abundant number, since it is smaller than the sum of its proper divisors (62314890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61871142 is a wasteful number, since it uses less digits than its factorization.

61871142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36983.

The product of its digits is 2688, while the sum is 30.

The square root of 61871142 is about 7865.8211268754. The cubic root of 61871142 is about 395.5147740164.

Adding to 61871142 its reverse (24117816), we get a palindrome (85988958).

The spelling of 61871142 in words is "sixty-one million, eight hundred seventy-one thousand, one hundred forty-two".