61099942 has 4 divisors (see below), whose sum is σ = 91649916. Its totient is φ = 30549970.

The previous prime is 61099939. The next prime is 61099949. The reversal of 61099942 is 24999016.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 61099895 and 61099904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61099949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15274984 + ... + 15274987.

It is an arithmetic number, because the mean of its divisors is an integer number (22912479).

Almost surely, 2^61099942 is an apocalyptic number.

61099942 is a deficient number, since it is larger than the sum of its proper divisors (30549974).

61099942 is a wasteful number, since it uses less digits than its factorization.

61099942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30549973.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 61099942 is about 7816.6451883145. The cubic root of 61099942 is about 393.8645853797.

The spelling of 61099942 in words is "sixty-one million, ninety-nine thousand, nine hundred forty-two".