1428506081 has 8 divisors (see below), whose sum is σ = 1436713824. Its totient is φ = 1420312320.

The previous prime is 1428506069. The next prime is 1428506173. The reversal of 1428506081 is 1806058241.

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 1428506081 - 2⁶ = 1428506017 is a prime.

It is a super-2 number, since 2×1428506081² = 4081259246907957122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428206081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254006 + ... + 259568.

It is an arithmetic number, because the mean of its divisors is an integer number (179589228).

Almost surely, 2^1428506081 is an apocalyptic number.

It is an amenable number.

1428506081 is a deficient number, since it is larger than the sum of its proper divisors (8207743).

1428506081 is a wasteful number, since it uses less digits than its factorization.

1428506081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6991.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 1428506081 is about 37795.5828239227. The cubic root of 1428506081 is about 1126.2307074169.

The spelling of 1428506081 in words is "one billion, four hundred twenty-eight million, five hundred six thousand, eighty-one".