1254005045 has 4 divisors (see below), whose sum is σ = 1504806060. Its totient is φ = 1003204032.

The previous prime is 1254005003. The next prime is 1254005047. The reversal of 1254005045 is 5405004521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5405004521 = 7 ⋅772143503.

It can be written as a sum of positive squares in 2 ways, for example, as 768287524 + 485717521 = 27718^2 + 22039^2 .

It is a cyclic number.

It is not a de Polignac number, because 1254005045 - 2²² = 1249810741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254005047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125400500 + ... + 125400509.

It is an arithmetic number, because the mean of its divisors is an integer number (376201515).

Almost surely, 2^1254005045 is an apocalyptic number.

It is an amenable number.

1254005045 is a deficient number, since it is larger than the sum of its proper divisors (250801015).

1254005045 is an equidigital number, since it uses as much as digits as its factorization.

1254005045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250801014.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 1254005045 is about 35411.9336523720. The cubic root of 1254005045 is about 1078.3665995220.

Adding to 1254005045 its reverse (5405004521), we get a palindrome (6659009566).

The spelling of 1254005045 in words is "one billion, two hundred fifty-four million, five thousand, forty-five".