1301356240 has 20 divisors (see below), whose sum is σ = 3025653444. Its totient is φ = 520542464.

The previous prime is 1301356211. The next prime is 1301356247. The reversal of 1301356240 is 426531031.

It can be written as a sum of positive squares in 2 ways, for example, as 318408336 + 982947904 = 17844^2 + 31352^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301356247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8133397 + ... + 8133556.

Almost surely, 2^1301356240 is an apocalyptic number.

1301356240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1301356240 is an abundant number, since it is smaller than the sum of its proper divisors (1724297204).

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

1301356240 is a wasteful number, since it uses less digits than its factorization.

1301356240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16266966 (or 16266960 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1301356240 is about 36074.3155167219. The cubic root of 1301356240 is about 1091.7722872252.

Adding to 1301356240 its reverse (426531031), we get a palindrome (1727887271).

The spelling of 1301356240 in words is "one billion, three hundred one million, three hundred fifty-six thousand, two hundred forty".