61243142 has 4 divisors (see below), whose sum is σ = 91864716. Its totient is φ = 30621570.

The previous prime is 61243139. The next prime is 61243183. The reversal of 61243142 is 24134216.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15310784 + ... + 15310787.

It is an arithmetic number, because the mean of its divisors is an integer number (22966179).

Almost surely, 2^61243142 is an apocalyptic number.

61243142 is a deficient number, since it is larger than the sum of its proper divisors (30621574).

61243142 is a wasteful number, since it uses less digits than its factorization.

61243142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30621573.

The product of its digits is 1152, while the sum is 23.

The square root of 61243142 is about 7825.7997674359. The cubic root of 61243142 is about 394.1720455910.

Adding to 61243142 its reverse (24134216), we get a palindrome (85377358).

The spelling of 61243142 in words is "sixty-one million, two hundred forty-three thousand, one hundred forty-two".