1254006605 has 4 divisors (see below), whose sum is σ = 1504807932. Its totient is φ = 1003205280.

The previous prime is 1254006569. The next prime is 1254006619. The reversal of 1254006605 is 5066004521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5066004521 = 59419 ⋅85259.

It can be written as a sum of positive squares in 2 ways, for example, as 913308841 + 340697764 = 30221^2 + 18458^2 .

It is not a de Polignac number, because 1254006605 - 2¹⁶ = 1253941069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125400656 + ... + 125400665.

It is an arithmetic number, because the mean of its divisors is an integer number (376201983).

Almost surely, 2^1254006605 is an apocalyptic number.

It is an amenable number.

1254006605 is a deficient number, since it is larger than the sum of its proper divisors (250801327).

1254006605 is an equidigital number, since it uses as much as digits as its factorization.

1254006605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250801326.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1254006605 is about 35411.9556788382. The cubic root of 1254006605 is about 1078.3670466895.

The spelling of 1254006605 in words is "one billion, two hundred fifty-four million, six thousand, six hundred five".