1245699449 has 2 divisors, whose sum is σ = 1245699450. Its totient is φ = 1245699448.

The previous prime is 1245699419. The next prime is 1245699547. The reversal of 1245699449 is 9449965421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1242210025 + 3489424 = 35245^2 + 1868^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245699449 - 2¹⁶ = 1245633913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1245699449.

It is not a weakly prime, because it can be changed into another prime (1245699419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622849724 + 622849725.

It is an arithmetic number, because the mean of its divisors is an integer number (622849725).

Almost surely, 2^1245699449 is an apocalyptic number.

It is an amenable number.

1245699449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245699449 is an equidigital number, since it uses as much as digits as its factorization.

1245699449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 53.

The square root of 1245699449 is about 35294.4676826270. The cubic root of 1245699449 is about 1075.9805580642.

The spelling of 1245699449 in words is "one billion, two hundred forty-five million, six hundred ninety-nine thousand, four hundred forty-nine".