1302250640 has 20 divisors (see below), whose sum is σ = 3027732924. Its totient is φ = 520900224.

The previous prime is 1302250637. The next prime is 1302250673. The reversal of 1302250640 is 460522031.

It can be written as a sum of positive squares in 2 ways, for example, as 878055424 + 424195216 = 29632^2 + 20596^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8138987 + ... + 8139146.

Almost surely, 2^1302250640 is an apocalyptic number.

1302250640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1302250640 is an abundant number, since it is smaller than the sum of its proper divisors (1725482284).

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

1302250640 is a wasteful number, since it uses less digits than its factorization.

1302250640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16278146 (or 16278140 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1302250640 is about 36086.7100190638. The cubic root of 1302250640 is about 1092.0223487847.

Adding to 1302250640 its reverse (460522031), we get a palindrome (1762772671).

The spelling of 1302250640 in words is "one billion, three hundred two million, two hundred fifty thousand, six hundred forty".