1245763240 has 32 divisors (see below), whose sum is σ = 2831872680. Its totient is φ = 493166592.

The previous prime is 1245763219. The next prime is 1245763273. The reversal of 1245763240 is 423675421.

It can be written as a sum of positive squares in 4 ways, for example, as 753722116 + 492041124 = 27454^2 + 22182^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1245763196 and 1245763205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156657 + ... + 164416.

Almost surely, 2^1245763240 is an apocalyptic number.

1245763240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245763240 is an abundant number, since it is smaller than the sum of its proper divisors (1586109440).

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

1245763240 is a wasteful number, since it uses less digits than its factorization.

1245763240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321181 (or 321177 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 1245763240 is about 35295.3713679287. The cubic root of 1245763240 is about 1075.9989243735.

The spelling of 1245763240 in words is "one billion, two hundred forty-five million, seven hundred sixty-three thousand, two hundred forty".