1351731420 has 144 divisors (see below), whose sum is σ = 4435966080. Its totient is φ = 331204608.

The previous prime is 1351731401. The next prime is 1351731431. The reversal of 1351731420 is 241371531.

1351731420 is a `hidden beast` number, since 1 + 3 + 517 + 3 + 142 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 558052 + ... + 560468.

It is an arithmetic number, because the mean of its divisors is an integer number (30805320).

Almost surely, 2^1351731420 is an apocalyptic number.

1351731420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1351731420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2217983040).

1351731420 is an abundant number, since it is smaller than the sum of its proper divisors (3084234660).

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

1351731420 is a wasteful number, since it uses less digits than its factorization.

1351731420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684 (or 2679 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1351731420 is about 36765.9002337764. The cubic root of 1351731420 is about 1105.6817370613.

The spelling of 1351731420 in words is "one billion, three hundred fifty-one million, seven hundred thirty-one thousand, four hundred twenty".