1720131451 has 8 divisors (see below), whose sum is σ = 1863672624. Its totient is φ = 1581296640.

The previous prime is 1720131437. The next prime is 1720131473. The reversal of 1720131451 is 1541310271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1720131451 - 2⁵ = 1720131419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1720131421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1175830 + ... + 1177291.

It is an arithmetic number, because the mean of its divisors is an integer number (232959078).

Almost surely, 2^1720131451 is an apocalyptic number.

1720131451 is a deficient number, since it is larger than the sum of its proper divisors (143541173).

1720131451 is a wasteful number, since it uses less digits than its factorization.

1720131451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353181.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1720131451 is about 41474.4674589078. The cubic root of 1720131451 is about 1198.1758049526.

The spelling of 1720131451 in words is "one billion, seven hundred twenty million, one hundred thirty-one thousand, four hundred fifty-one".