1255266421 has 8 divisors (see below), whose sum is σ = 1301050080. Its totient is φ = 1209649392.

The previous prime is 1255266401. The next prime is 1255266437. The reversal of 1255266421 is 1246625521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1255266421 - 2¹⁹ = 1254742133 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 (1255266401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26215 + ... + 56548.

It is an arithmetic number, because the mean of its divisors is an integer number (162631260).

Almost surely, 2^1255266421 is an apocalyptic number.

It is an amenable number.

1255266421 is a deficient number, since it is larger than the sum of its proper divisors (45783659).

1255266421 is an equidigital number, since it uses as much as digits as its factorization.

1255266421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83315.

The product of its digits is 28800, while the sum is 34.

The square root of 1255266421 is about 35429.7392172169. The cubic root of 1255266421 is about 1078.7280467464.

The spelling of 1255266421 in words is "one billion, two hundred fifty-five million, two hundred sixty-six thousand, four hundred twenty-one".