1254720545 has 16 divisors (see below), whose sum is σ = 1641028032. Its totient is φ = 915395520.

The previous prime is 1254720527. The next prime is 1254720617. The reversal of 1254720545 is 5450274521.

It is not a de Polignac number, because 1254720545 - 2¹⁶ = 1254655009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110891 + ... + 121680.

It is an arithmetic number, because the mean of its divisors is an integer number (102564252).

Almost surely, 2^1254720545 is an apocalyptic number.

It is an amenable number.

1254720545 is a deficient number, since it is larger than the sum of its proper divisors (386307487).

1254720545 is a wasteful number, since it uses less digits than its factorization.

1254720545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232672.

The product of its (nonzero) digits is 56000, while the sum is 35.

The square root of 1254720545 is about 35422.0347382812. The cubic root of 1254720545 is about 1078.5716557419.

The spelling of 1254720545 in words is "one billion, two hundred fifty-four million, seven hundred twenty thousand, five hundred forty-five".