1245235540 has 12 divisors (see below), whose sum is σ = 2614994676. Its totient is φ = 498094208.

The previous prime is 1245235529. The next prime is 1245235549. The reversal of 1245235540 is 455325421.

It can be written as a sum of positive squares in 2 ways, for example, as 922458384 + 322777156 = 30372^2 + 17966^2 .

It is a super-2 number, since 2×1245235540² = 3101223100158183200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245235549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31130869 + ... + 31130908.

It is an arithmetic number, because the mean of its divisors is an integer number (217916223).

Almost surely, 2^1245235540 is an apocalyptic number.

1245235540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245235540 is an abundant number, since it is smaller than the sum of its proper divisors (1369759136).

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

1245235540 is a wasteful number, since it uses less digits than its factorization.

1245235540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62261786 (or 62261784 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 1245235540 is about 35287.8950916600. The cubic root of 1245235540 is about 1075.8469733964.

The spelling of 1245235540 in words is "one billion, two hundred forty-five million, two hundred thirty-five thousand, five hundred forty".