1245415240 has 32 divisors (see below), whose sum is σ = 2967020280. Its totient is φ = 468861952.

The previous prime is 1245415231. The next prime is 1245415243. The reversal of 1245415240 is 425145421.

It can be written as a sum of positive squares in 4 ways, for example, as 1191216196 + 54199044 = 34514^2 + 7362^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1245415199 and 1245415208.

It is not an unprimeable number, because it can be changed into a prime (1245415243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 915067 + ... + 916426.

Almost surely, 2^1245415240 is an apocalyptic number.

1245415240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245415240 is an abundant number, since it is smaller than the sum of its proper divisors (1721605040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245415240 is a wasteful number, since it uses less digits than its factorization.

1245415240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831521 (or 1831517 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 1245415240 is about 35290.4411987156. The cubic root of 1245415240 is about 1075.8987227498.

The spelling of 1245415240 in words is "one billion, two hundred forty-five million, four hundred fifteen thousand, two hundred forty".