61971842 has 4 divisors (see below), whose sum is σ = 92957766. Its totient is φ = 30985920.

The previous prime is 61971829. The next prime is 61971881. The reversal of 61971842 is 24817916.

61971842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50282281 + 11689561 = 7091^2 + 3419^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61971796 and 61971805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15492959 + ... + 15492962.

Almost surely, 2^61971842 is an apocalyptic number.

61971842 is a deficient number, since it is larger than the sum of its proper divisors (30985924).

61971842 is a wasteful number, since it uses less digits than its factorization.

61971842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30985923.

The product of its digits is 24192, while the sum is 38.

The square root of 61971842 is about 7872.2196361636. The cubic root of 61971842 is about 395.7292345230.

The spelling of 61971842 in words is "sixty-one million, nine hundred seventy-one thousand, eight hundred forty-two".