2001420577 has 4 divisors (see below), whose sum is σ = 2155376020. Its totient is φ = 1847465136.

The previous prime is 2001420571. The next prime is 2001420607. The reversal of 2001420577 is 7750241002.

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 1310729616 + 690690961 = 36204^2 + 26281^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001420577 - 2³ = 2001420569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001420571) 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, 76977702 + ... + 76977727.

It is an arithmetic number, because the mean of its divisors is an integer number (538844005).

Almost surely, 2^2001420577 is an apocalyptic number.

It is an amenable number.

2001420577 is a deficient number, since it is larger than the sum of its proper divisors (153955443).

2001420577 is a wasteful number, since it uses less digits than its factorization.

2001420577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153955442.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 2001420577 is about 44737.2392643981. The cubic root of 2001420577 is about 1260.2192817733.

Adding to 2001420577 its reverse (7750241002), we get a palindrome (9751661579).

The spelling of 2001420577 in words is "two billion, one million, four hundred twenty thousand, five hundred seventy-seven".