1721145135 has 8 divisors (see below), whose sum is σ = 2753832240. Its totient is φ = 917944064.

The previous prime is 1721145103. The next prime is 1721145143. The reversal of 1721145135 is 5315411271.

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 1721145135 - 2⁵ = 1721145103 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57371490 + ... + 57371519.

It is an arithmetic number, because the mean of its divisors is an integer number (344229030).

Almost surely, 2^1721145135 is an apocalyptic number.

1721145135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1721145135 is a deficient number, since it is larger than the sum of its proper divisors (1032687105).

1721145135 is a wasteful number, since it uses less digits than its factorization.

1721145135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114743017.

The product of its digits is 4200, while the sum is 30.

The square root of 1721145135 is about 41486.6862378764. The cubic root of 1721145135 is about 1198.4111228475.

The spelling of 1721145135 in words is "one billion, seven hundred twenty-one million, one hundred forty-five thousand, one hundred thirty-five".