1254517421 has 2 divisors, whose sum is σ = 1254517422. Its totient is φ = 1254517420.

The previous prime is 1254517391. The next prime is 1254517441. The reversal of 1254517421 is 1247154521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1254151396 + 366025 = 35414^2 + 605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1254517421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1254517441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627258710 + 627258711.

It is an arithmetic number, because the mean of its divisors is an integer number (627258711).

Almost surely, 2^1254517421 is an apocalyptic number.

It is an amenable number.

1254517421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254517421 is an equidigital number, since it uses as much as digits as its factorization.

1254517421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11200, while the sum is 32.

The square root of 1254517421 is about 35419.1674238681. The cubic root of 1254517421 is about 1078.5134500553.

The spelling of 1254517421 in words is "one billion, two hundred fifty-four million, five hundred seventeen thousand, four hundred twenty-one".