1254240109 has 2 divisors, whose sum is σ = 1254240110. Its totient is φ = 1254240108.

The previous prime is 1254240107. The next prime is 1254240133. The reversal of 1254240109 is 9010424521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1196814025 + 57426084 = 34595^2 + 7578^2 .

It is a cyclic number.

It is not a de Polignac number, because 1254240109 - 2¹ = 1254240107 is a prime.

Together with 1254240107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1254240107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627120054 + 627120055.

It is an arithmetic number, because the mean of its divisors is an integer number (627120055).

Almost surely, 2^1254240109 is an apocalyptic number.

It is an amenable number.

1254240109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254240109 is an equidigital number, since it uses as much as digits as its factorization.

1254240109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1254240109 is about 35415.2524909819. The cubic root of 1254240109 is about 1078.4339754682.

The spelling of 1254240109 in words is "one billion, two hundred fifty-four million, two hundred forty thousand, one hundred nine".