60261721 has 4 divisors (see below), whose sum is σ = 64897252. Its totient is φ = 55626192.

The previous prime is 60261713. The next prime is 60261727. The reversal of 60261721 is 12716206.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5664400 + 54597321 = 2380^2 + 7389^2 .

It is a cyclic number.

It is not a de Polignac number, because 60261721 - 2³ = 60261713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60261727) 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, 2317746 + ... + 2317771.

It is an arithmetic number, because the mean of its divisors is an integer number (16224313).

Almost surely, 2^60261721 is an apocalyptic number.

It is an amenable number.

60261721 is a deficient number, since it is larger than the sum of its proper divisors (4635531).

60261721 is a wasteful number, since it uses less digits than its factorization.

60261721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4635530.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 60261721 is about 7762.8423273953. The cubic root of 60261721 is about 392.0551623920.

Adding to 60261721 its reverse (12716206), we get a palindrome (72977927).

The spelling of 60261721 in words is "sixty million, two hundred sixty-one thousand, seven hundred twenty-one".