61820742 has 8 divisors (see below), whose sum is σ = 123641496. Its totient is φ = 20606912.

The previous prime is 61820723. The next prime is 61820749. The reversal of 61820742 is 24702816.

It is a sphenic number, since it is the product of 3 distinct primes.

61820742 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61820749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5151723 + ... + 5151734.

It is an arithmetic number, because the mean of its divisors is an integer number (15455187).

Almost surely, 2^61820742 is an apocalyptic number.

61820742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61820742 is a wasteful number, since it uses less digits than its factorization.

61820742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10303462.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 61820742 is about 7862.6167399918. The cubic root of 61820742 is about 395.4073498920.

The spelling of 61820742 in words is "sixty-one million, eight hundred twenty thousand, seven hundred forty-two".