1254921641 has 2 divisors, whose sum is σ = 1254921642. Its totient is φ = 1254921640.

The previous prime is 1254921617. The next prime is 1254921673. The reversal of 1254921641 is 1461294521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 881852416 + 373069225 = 29696^2 + 19315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1254921641 - 2¹⁰ = 1254920617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1254921541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627460820 + 627460821.

It is an arithmetic number, because the mean of its divisors is an integer number (627460821).

Almost surely, 2^1254921641 is an apocalyptic number.

It is an amenable number.

1254921641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254921641 is an equidigital number, since it uses as much as digits as its factorization.

1254921641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 1254921641 is about 35424.8731966679. The cubic root of 1254921641 is about 1078.6292741123.

The spelling of 1254921641 in words is "one billion, two hundred fifty-four million, nine hundred twenty-one thousand, six hundred forty-one".