61205542 has 16 divisors (see below), whose sum is σ = 97567632. Its totient is φ = 28696320.

The previous prime is 61205537. The next prime is 61205549. The reversal of 61205542 is 24550216.

It is a super-2 number, since 2×61205542² = 7492236743027528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61205549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6442 + ... + 12802.

It is an arithmetic number, because the mean of its divisors is an integer number (6097977).

Almost surely, 2^61205542 is an apocalyptic number.

61205542 is a deficient number, since it is larger than the sum of its proper divisors (36362090).

61205542 is a wasteful number, since it uses less digits than its factorization.

61205542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6663.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 61205542 is about 7823.3970882220. The cubic root of 61205542 is about 394.0913622549.

Adding to 61205542 its reverse (24550216), we get a palindrome (85755758).

The spelling of 61205542 in words is "sixty-one million, two hundred five thousand, five hundred forty-two".