1320402135 has 32 divisors (see below), whose sum is σ = 2290272768. Its totient is φ = 645724800.

The previous prime is 1320402133. The next prime is 1320402151. The reversal of 1320402135 is 5312040231.

It is not a de Polignac number, because 1320402135 - 2¹ = 1320402133 is a prime.

It is a super-2 number, since 2×1320402135² = 3486923596225116450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320402133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7024 + ... + 51866.

It is an arithmetic number, because the mean of its divisors is an integer number (71571024).

Almost surely, 2^1320402135 is an apocalyptic number.

1320402135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1320402135 is a deficient number, since it is larger than the sum of its proper divisors (969870633).

1320402135 is a wasteful number, since it uses less digits than its factorization.

1320402135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45015.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1320402135 is about 36337.3380285348. The cubic root of 1320402135 is about 1097.0726947663.

Adding to 1320402135 its reverse (5312040231), we get a palindrome (6632442366).

The spelling of 1320402135 in words is "one billion, three hundred twenty million, four hundred two thousand, one hundred thirty-five".