61042642 has 4 divisors (see below), whose sum is σ = 91563966. Its totient is φ = 30521320.

The previous prime is 61042633. The next prime is 61042643. The reversal of 61042642 is 24624016.

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., 45684081 + 15358561 = 6759^2 + 3919^2 .

It is not an unprimeable number, because it can be changed into a prime (61042643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15260659 + ... + 15260662.

Almost surely, 2^61042642 is an apocalyptic number.

61042642 is a deficient number, since it is larger than the sum of its proper divisors (30521324).

61042642 is a wasteful number, since it uses less digits than its factorization.

61042642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30521323.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 61042642 is about 7812.9790733113. The cubic root of 61042642 is about 393.7414237823.

Adding to 61042642 its reverse (24624016), we get a palindrome (85666658).

The spelling of 61042642 in words is "sixty-one million, forty-two thousand, six hundred forty-two".