4512703021 has 4 divisors (see below), whose sum is σ = 4668313500. Its totient is φ = 4357092544.

The previous prime is 4512703003. The next prime is 4512703037. The reversal of 4512703021 is 1203072154.

It is a happy number.

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 2137212900 + 2375490121 = 46230^2 + 48739^2 .

It is a cyclic number.

It is not a de Polignac number, because 4512703021 - 2⁷ = 4512702893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4512703061) 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, 77805196 + ... + 77805253.

It is an arithmetic number, because the mean of its divisors is an integer number (1167078375).

Almost surely, 2^4512703021 is an apocalyptic number.

It is an amenable number.

4512703021 is a deficient number, since it is larger than the sum of its proper divisors (155610479).

4512703021 is a wasteful number, since it uses less digits than its factorization.

4512703021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155610478.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 4512703021 is about 67176.6553275764. The cubic root of 4512703021 is about 1652.5156631408.

Adding to 4512703021 its reverse (1203072154), we get a palindrome (5715775175).

The spelling of 4512703021 in words is "four billion, five hundred twelve million, seven hundred three thousand, twenty-one".