1265214451 has 2 divisors, whose sum is σ = 1265214452. Its totient is φ = 1265214450.

The previous prime is 1265214403. The next prime is 1265214493. The reversal of 1265214451 is 1544125621.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1544125621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1265214451 - 2¹³ = 1265206259 is a prime.

It is not a weakly prime, because it can be changed into another prime (1265217451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632607225 + 632607226.

It is an arithmetic number, because the mean of its divisors is an integer number (632607226).

Almost surely, 2^1265214451 is an apocalyptic number.

1265214451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265214451 is an equidigital number, since it uses as much as digits as its factorization.

1265214451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 31.

The square root of 1265214451 is about 35569.8531203040. The cubic root of 1265214451 is about 1081.5702042679.

The spelling of 1265214451 in words is "one billion, two hundred sixty-five million, two hundred fourteen thousand, four hundred fifty-one".