61006420 has 12 divisors (see below), whose sum is σ = 128113524. Its totient is φ = 24402560.

The previous prime is 61006391. The next prime is 61006427. The reversal of 61006420 is 2460016.

It can be written as a sum of positive squares in 2 ways, for example, as 11641744 + 49364676 = 3412^2 + 7026^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61006427) 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, 1525141 + ... + 1525180.

It is an arithmetic number, because the mean of its divisors is an integer number (10676127).

Almost surely, 2^61006420 is an apocalyptic number.

It is an amenable number.

61006420 is an abundant number, since it is smaller than the sum of its proper divisors (67107104).

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

61006420 is a wasteful number, since it uses less digits than its factorization.

61006420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050330 (or 3050328 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 61006420 is about 7810.6606634778. The cubic root of 61006420 is about 393.6635278323.

Adding to 61006420 its reverse (2460016), we get a palindrome (63466436).

The spelling of 61006420 in words is "sixty-one million, six thousand, four hundred twenty".