1301212240 has 20 divisors (see below), whose sum is σ = 3025318644. Its totient is φ = 520484864.

The previous prime is 1301212229. The next prime is 1301212247. The reversal of 1301212240 is 422121031.

It can be written as a sum of positive squares in 2 ways, for example, as 1038901824 + 262310416 = 32232^2 + 16196^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301212247) 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, 8132497 + ... + 8132656.

Almost surely, 2^1301212240 is an apocalyptic number.

1301212240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1301212240 is an abundant number, since it is smaller than the sum of its proper divisors (1724106404).

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

1301212240 is a wasteful number, since it uses less digits than its factorization.

1301212240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16265166 (or 16265160 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1301212240 is about 36072.3195816404. The cubic root of 1301212240 is about 1091.7320161593.

Adding to 1301212240 its reverse (422121031), we get a palindrome (1723333271).

It can be divided in two parts, 13012 and 12240, that added together give a palindrome (25252).

The spelling of 1301212240 in words is "one billion, three hundred one million, two hundred twelve thousand, two hundred forty".