1245355664 has 40 divisors (see below), whose sum is σ = 2761638720. Its totient is φ = 532937088.

The previous prime is 1245355651. The next prime is 1245355667. The reversal of 1245355664 is 4665535421.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1245355667) 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, 71567 + ... + 87249.

It is an arithmetic number, because the mean of its divisors is an integer number (69040968).

Almost surely, 2^1245355664 is an apocalyptic number.

1245355664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1245355664 is an abundant number, since it is smaller than the sum of its proper divisors (1516283056).

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

1245355664 is a wasteful number, since it uses less digits than its factorization.

1245355664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16407 (or 16401 counting only the distinct ones).

The product of its digits is 432000, while the sum is 41.

The square root of 1245355664 is about 35289.5971073630. The cubic root of 1245355664 is about 1075.8815668213.

The spelling of 1245355664 in words is "one billion, two hundred forty-five million, three hundred fifty-five thousand, six hundred sixty-four".