61626021 has 8 divisors (see below), whose sum is σ = 82246560. Its totient is φ = 41044752.

The previous prime is 61626011. The next prime is 61626023. The reversal of 61626021 is 12062616.

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

It is not a de Polignac number, because 61626021 - 2⁵ = 61625989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61625982 and 61626000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61626023) 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, 5935 + ... + 12588.

It is an arithmetic number, because the mean of its divisors is an integer number (10280820).

Almost surely, 2^61626021 is an apocalyptic number.

It is an amenable number.

61626021 is a deficient number, since it is larger than the sum of its proper divisors (20620539).

61626021 is a wasteful number, since it uses less digits than its factorization.

61626021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19635.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 61626021 is about 7850.2242643125. The cubic root of 61626021 is about 394.9917661051.

Adding to 61626021 its reverse (12062616), we get a palindrome (73688637).

The spelling of 61626021 in words is "sixty-one million, six hundred twenty-six thousand, twenty-one".