1200255801 has 4 divisors (see below), whose sum is σ = 1600341072. Its totient is φ = 800170532.

The previous prime is 1200255773. The next prime is 1200255803. The reversal of 1200255801 is 1085520021.

1200255801 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200255801 - 2¹⁹ = 1199731513 is a prime.

It is a super-2 number, since 2×1200255801² = 2881227975668303202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1200255803) 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, 200042631 + ... + 200042636.

It is an arithmetic number, because the mean of its divisors is an integer number (400085268).

Almost surely, 2^1200255801 is an apocalyptic number.

It is an amenable number.

1200255801 is a deficient number, since it is larger than the sum of its proper divisors (400085271).

1200255801 is an equidigital number, since it uses as much as digits as its factorization.

1200255801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400085270.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1200255801 is about 34644.7081240411. The cubic root of 1200255801 is about 1062.7340719081.

Adding to 1200255801 its reverse (1085520021), we get a palindrome (2285775822).

The spelling of 1200255801 in words is "one billion, two hundred million, two hundred fifty-five thousand, eight hundred one".