4251505145 has 4 divisors (see below), whose sum is σ = 5101806180. Its totient is φ = 3401204112.

The previous prime is 4251505133. The next prime is 4251505177. The reversal of 4251505145 is 5415051524.

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 2670408976 + 1581096169 = 51676^2 + 39763^2 .

It is a cyclic number.

It is not a de Polignac number, because 4251505145 - 2²² = 4247310841 is a prime.

It is a super-2 number, since 2×4251505145² = 36150591995922942050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425150510 + ... + 425150519.

It is an arithmetic number, because the mean of its divisors is an integer number (1275451545).

Almost surely, 2^4251505145 is an apocalyptic number.

It is an amenable number.

4251505145 is a deficient number, since it is larger than the sum of its proper divisors (850301035).

4251505145 is an equidigital number, since it uses as much as digits as its factorization.

4251505145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850301034.

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 4251505145 is about 65203.5669653126. The cubic root of 4251505145 is about 1619.9970971091.

Adding to 4251505145 its reverse (5415051524), we get a palindrome (9666556669).

The spelling of 4251505145 in words is "four billion, two hundred fifty-one million, five hundred five thousand, one hundred forty-five".