1245398730 has 16 divisors (see below), whose sum is σ = 2988957024. Its totient is φ = 332106320.

The previous prime is 1245398701. The next prime is 1245398773. The reversal of 1245398730 is 378935421.

It is a super-2 number, since 2×1245398730² = 3102035993371225800, which contains 22 as substring.

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, 20756616 + ... + 20756675.

It is an arithmetic number, because the mean of its divisors is an integer number (186809814).

Almost surely, 2^1245398730 is an apocalyptic number.

1245398730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1245398730 is an abundant number, since it is smaller than the sum of its proper divisors (1743558294).

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

1245398730 is a wasteful number, since it uses less digits than its factorization.

1245398730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41513301.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 1245398730 is about 35290.2072819075. The cubic root of 1245398730 is about 1075.8939684676.

The spelling of 1245398730 in words is "one billion, two hundred forty-five million, three hundred ninety-eight thousand, seven hundred thirty".