61731242 has 4 divisors (see below), whose sum is σ = 92596866. Its totient is φ = 30865620.

The previous prime is 61731223. The next prime is 61731251. The reversal of 61731242 is 24213716.

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., 38700841 + 23030401 = 6221^2 + 4799^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15432809 + ... + 15432812.

Almost surely, 2^61731242 is an apocalyptic number.

61731242 is a deficient number, since it is larger than the sum of its proper divisors (30865624).

61731242 is a wasteful number, since it uses less digits than its factorization.

61731242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30865623.

The product of its digits is 2016, while the sum is 26.

The square root of 61731242 is about 7856.9231891371. The cubic root of 61731242 is about 395.2164428256.

Adding to 61731242 its reverse (24213716), we get a palindrome (85944958).

The spelling of 61731242 in words is "sixty-one million, seven hundred thirty-one thousand, two hundred forty-two".