1311240030 has 32 divisors (see below), whose sum is σ = 3160051488. Its totient is φ = 348211200.

The previous prime is 1311240023. The next prime is 1311240037. The reversal of 1311240030 is 300421131.

It is an interprime number because it is at equal distance from previous prime (1311240023) and next prime (1311240037).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 1311239991 and 1311240009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311240037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83451 + ... + 97910.

It is an arithmetic number, because the mean of its divisors is an integer number (98751609).

Almost surely, 2^1311240030 is an apocalyptic number.

1311240030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311240030 is an abundant number, since it is smaller than the sum of its proper divisors (1848811458).

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

1311240030 is a wasteful number, since it uses less digits than its factorization.

1311240030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181612.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1311240030 is about 36211.0484520954. The cubic root of 1311240030 is about 1094.5293196125.

Adding to 1311240030 its reverse (300421131), we get a palindrome (1611661161).

The spelling of 1311240030 in words is "one billion, three hundred eleven million, two hundred forty thousand, thirty".