61213842 has 24 divisors (see below), whose sum is σ = 132777216. Its totient is φ = 20381976.

The previous prime is 61213837. The next prime is 61213847. The reversal of 61213842 is 24831216.

61213842 is a `hidden beast` number, since 612 + 1 + 3 + 8 + 42 = 666.

It is an interprime number because it is at equal distance from previous prime (61213837) and next prime (61213847).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61213847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25623 + ... + 27909.

It is an arithmetic number, because the mean of its divisors is an integer number (5532384).

Almost surely, 2^61213842 is an apocalyptic number.

61213842 is an abundant number, since it is smaller than the sum of its proper divisors (71563374).

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

61213842 is a wasteful number, since it uses less digits than its factorization.

61213842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782 (or 3779 counting only the distinct ones).

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

The square root of 61213842 is about 7823.9275303392. The cubic root of 61213842 is about 394.1091755136.

The spelling of 61213842 in words is "sixty-one million, two hundred thirteen thousand, eight hundred forty-two".