61381242 has 24 divisors (see below), whose sum is σ = 143223444. Its totient is φ = 18886464.

The previous prime is 61381241. The next prime is 61381289. The reversal of 61381242 is 24218316.

61381242 is a `hidden beast` number, since 613 + 8 + 1 + 2 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 59582961 + 1798281 = 7719^2 + 1341^2 .

It is not an unprimeable number, because it can be changed into a prime (61381241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130923 + ... + 131390.

Almost surely, 2^61381242 is an apocalyptic number.

61381242 is an abundant number, since it is smaller than the sum of its proper divisors (81842202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61381242 is a wasteful number, since it uses less digits than its factorization.

61381242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262334 (or 262331 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 61381242 is about 7834.6181783160. The cubic root of 61381242 is about 394.4681021114.

Adding to 61381242 its reverse (24218316), we get a palindrome (85599558).

The spelling of 61381242 in words is "sixty-one million, three hundred eighty-one thousand, two hundred forty-two".