1254921617 has 2 divisors, whose sum is σ = 1254921618. Its totient is φ = 1254921616.

The previous prime is 1254921593. The next prime is 1254921641. The reversal of 1254921617 is 7161294521.

It is a balanced prime because it is at equal distance from previous prime (1254921593) and next prime (1254921641).

It can be written as a sum of positive squares in only one way, i.e., 884705536 + 370216081 = 29744^2 + 19241^2 .

It is an emirp because it is prime and its reverse (7161294521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1254921617 - 2⁸ = 1254921361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1254921677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627460808 + 627460809.

It is an arithmetic number, because the mean of its divisors is an integer number (627460809).

Almost surely, 2^1254921617 is an apocalyptic number.

It is an amenable number.

1254921617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254921617 is an equidigital number, since it uses as much as digits as its factorization.

1254921617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 1254921617 is about 35424.8728579229. The cubic root of 1254921617 is about 1078.6292672361.

The spelling of 1254921617 in words is "one billion, two hundred fifty-four million, nine hundred twenty-one thousand, six hundred seventeen".