1245103215 has 32 divisors (see below), whose sum is σ = 2031132672. Its totient is φ = 651168000.

The previous prime is 1245103201. The next prime is 1245103217. The reversal of 1245103215 is 5123015421.

It is a happy number.

1245103215 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 1245103215 - 2⁶ = 1245103151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245103217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200355 + ... + 206475.

It is an arithmetic number, because the mean of its divisors is an integer number (63472896).

Almost surely, 2^1245103215 is an apocalyptic number.

1245103215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1245103215 is a deficient number, since it is larger than the sum of its proper divisors (786029457).

1245103215 is a wasteful number, since it uses less digits than its factorization.

1245103215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6391.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1245103215 is about 35286.0201071189. The cubic root of 1245103215 is about 1075.8088637405.

Adding to 1245103215 its reverse (5123015421), we get a palindrome (6368118636).

The spelling of 1245103215 in words is "one billion, two hundred forty-five million, one hundred three thousand, two hundred fifteen".