1255021451 has 2 divisors, whose sum is σ = 1255021452. Its totient is φ = 1255021450.

The previous prime is 1255021433. The next prime is 1255021561. The reversal of 1255021451 is 1541205521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1255021451 - 2⁶ = 1255021387 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1255021451.

It is not a weakly prime, because it can be changed into another prime (1255021751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627510725 + 627510726.

It is an arithmetic number, because the mean of its divisors is an integer number (627510726).

Almost surely, 2^1255021451 is an apocalyptic number.

1255021451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255021451 is an equidigital number, since it uses as much as digits as its factorization.

1255021451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1255021451 is about 35426.2819245825. The cubic root of 1255021451 is about 1078.6578695587.

Adding to 1255021451 its reverse (1541205521), we get a palindrome (2796226972).

The spelling of 1255021451 in words is "one billion, two hundred fifty-five million, twenty-one thousand, four hundred fifty-one".