1254405243 has 48 divisors (see below), whose sum is σ = 2101510656. Its totient is φ = 659695680.

The previous prime is 1254405227. The next prime is 1254405247. The reversal of 1254405243 is 3425044521.

1254405243 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1254405243 - 2⁴ = 1254405227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1254405243.

It is not an unprimeable number, because it can be changed into a prime (1254405247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 822880 + ... + 824402.

It is an arithmetic number, because the mean of its divisors is an integer number (43781472).

Almost surely, 2^1254405243 is an apocalyptic number.

1254405243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1254405243 is a deficient number, since it is larger than the sum of its proper divisors (847105413).

1254405243 is a wasteful number, since it uses less digits than its factorization.

1254405243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984 (or 1977 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 1254405243 is about 35417.5838108700. The cubic root of 1254405243 is about 1078.4813024778.

Adding to 1254405243 its reverse (3425044521), we get a palindrome (4679449764).

The spelling of 1254405243 in words is "one billion, two hundred fifty-four million, four hundred five thousand, two hundred forty-three".