62540021 has 2 divisors, whose sum is σ = 62540022. Its totient is φ = 62540020.

The previous prime is 62539987. The next prime is 62540029. The reversal of 62540021 is 12004526.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60621796 + 1918225 = 7786^2 + 1385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-62540021 is a prime.

It is a super-2 number, since 2×62540021² = 7822508453360882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 62539975 and 62540002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (62540029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31270010 + 31270011.

It is an arithmetic number, because the mean of its divisors is an integer number (31270011).

Almost surely, 2^62540021 is an apocalyptic number.

It is an amenable number.

62540021 is a deficient number, since it is larger than the sum of its proper divisors (1).

62540021 is an equidigital number, since it uses as much as digits as its factorization.

62540021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 62540021 is about 7908.2248956387. The cubic root of 62540021 is about 396.9349507551.

Adding to 62540021 its reverse (12004526), we get a palindrome (74544547).

The spelling of 62540021 in words is "sixty-two million, five hundred forty thousand, twenty-one".