1254720106 has 4 divisors (see below), whose sum is σ = 1882080162. Its totient is φ = 627360052.

The previous prime is 1254720097. The next prime is 1254720109. The reversal of 1254720106 is 6010274521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 669515625 + 585204481 = 25875^2 + 24191^2 .

It is not an unprimeable number, because it can be changed into a prime (1254720109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313680025 + ... + 313680028.

Almost surely, 2^1254720106 is an apocalyptic number.

1254720106 is a deficient number, since it is larger than the sum of its proper divisors (627360056).

1254720106 is an equidigital number, since it uses as much as digits as its factorization.

1254720106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627360055.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1254720106 is about 35422.0285415728. The cubic root of 1254720106 is about 1078.5715299521.

Adding to 1254720106 its reverse (6010274521), we get a palindrome (7264994627).

The spelling of 1254720106 in words is "one billion, two hundred fifty-four million, seven hundred twenty thousand, one hundred six".