1245215408 has 10 divisors (see below), whose sum is σ = 2412604884. Its totient is φ = 622607696.

The previous prime is 1245215401. The next prime is 1245215417. The reversal of 1245215408 is 8045125421.

It is a super-2 number, since 2×1245215408² = 3101122824641212928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1245215401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38912966 + ... + 38912997.

Almost surely, 2^1245215408 is an apocalyptic number.

It is an amenable number.

1245215408 is a deficient number, since it is larger than the sum of its proper divisors (1167389476).

1245215408 is an equidigital number, since it uses as much as digits as its factorization.

1245215408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77825971 (or 77825965 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 1245215408 is about 35287.6098368818. The cubic root of 1245215408 is about 1075.8411755461.

The spelling of 1245215408 in words is "one billion, two hundred forty-five million, two hundred fifteen thousand, four hundred eight".