61806142 has 8 divisors (see below), whose sum is σ = 93627432. Its totient is φ = 30597000.

The previous prime is 61806133. The next prime is 61806167. The reversal of 61806142 is 24160816.

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

It is a self number, because there is not a number n which added to its sum of digits gives 61806142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152784 + ... + 153187.

It is an arithmetic number, because the mean of its divisors is an integer number (11703429).

Almost surely, 2^61806142 is an apocalyptic number.

61806142 is a deficient number, since it is larger than the sum of its proper divisors (31821290).

61806142 is a wasteful number, since it uses less digits than its factorization.

61806142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306074.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 61806142 is about 7861.6882410841. The cubic root of 61806142 is about 395.3762200929.

Adding to 61806142 its reverse (24160816), we get a palindrome (85966958).

The spelling of 61806142 in words is "sixty-one million, eight hundred six thousand, one hundred forty-two".