1245215434 has 4 divisors (see below), whose sum is σ = 1867823154. Its totient is φ = 622607716.

The previous prime is 1245215431. The next prime is 1245215437. The reversal of 1245215434 is 4345125421.

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

It is an interprime number because it is at equal distance from previous prime (1245215431) and next prime (1245215437).

It can be written as a sum of positive squares in only one way, i.e., 801059809 + 444155625 = 28303^2 + 21075^2 .

It is a super-2 number, since 2×1245215434² = 3101122954143616712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1245215396 and 1245215405.

It is not an unprimeable number, because it can be changed into a prime (1245215431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311303857 + ... + 311303860.

Almost surely, 2^1245215434 is an apocalyptic number.

1245215434 is a deficient number, since it is larger than the sum of its proper divisors (622607720).

1245215434 is an equidigital number, since it uses as much as digits as its factorization.

1245215434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622607719.

The product of its digits is 19200, while the sum is 31.

The square root of 1245215434 is about 35287.6102052831. The cubic root of 1245215434 is about 1075.8411830339.

The spelling of 1245215434 in words is "one billion, two hundred forty-five million, two hundred fifteen thousand, four hundred thirty-four".