1301135440 has 40 divisors (see below), whose sum is σ = 3300154848. Its totient is φ = 473139840.

The previous prime is 1301135417. The next prime is 1301135467. The reversal of 1301135440 is 445311031.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

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, 738402 + ... + 740161.

Almost surely, 2^1301135440 is an apocalyptic number.

1301135440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1301135440 is an abundant number, since it is smaller than the sum of its proper divisors (1999019408).

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

1301135440 is a wasteful number, since it uses less digits than its factorization.

1301135440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478587 (or 1478581 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1301135440 is about 36071.2550377721. The cubic root of 1301135440 is about 1091.7105370427.

Adding to 1301135440 its reverse (445311031), we get a palindrome (1746446471).

The spelling of 1301135440 in words is "one billion, three hundred one million, one hundred thirty-five thousand, four hundred forty".