1255020401 has 2 divisors, whose sum is σ = 1255020402. Its totient is φ = 1255020400.

The previous prime is 1255020313. The next prime is 1255020419. The reversal of 1255020401 is 1040205521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 990990400 + 264030001 = 31480^2 + 16249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255020401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1255020901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627510200 + 627510201.

It is an arithmetic number, because the mean of its divisors is an integer number (627510201).

Almost surely, 2^1255020401 is an apocalyptic number.

It is an amenable number.

1255020401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255020401 is an equidigital number, since it uses as much as digits as its factorization.

1255020401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1255020401 is about 35426.2671050733. The cubic root of 1255020401 is about 1078.6575687428.

Adding to 1255020401 its reverse (1040205521), we get a palindrome (2295225922).

The spelling of 1255020401 in words is "one billion, two hundred fifty-five million, twenty thousand, four hundred one".