128465519 has 36 divisors (see below), whose sum is σ = 165727728. Its totient is φ = 97493760.

The previous prime is 128465503. The next prime is 128465531. The reversal of 128465519 is 915564821.

It is not a de Polignac number, because 128465519 - 2⁴ = 128465503 is a prime.

It is a super-2 number, since 2×128465519² = 33006779143878722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128465569) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1136807 + ... + 1136919.

It is an arithmetic number, because the mean of its divisors is an integer number (4603548).

Almost surely, 2^128465519 is an apocalyptic number.

128465519 is a deficient number, since it is larger than the sum of its proper divisors (37262209).

128465519 is a wasteful number, since it uses less digits than its factorization.

128465519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 164 counting only the distinct ones).

The product of its digits is 86400, while the sum is 41.

The square root of 128465519 is about 11334.2630550027. The cubic root of 128465519 is about 504.5786361996.

The spelling of 128465519 in words is "one hundred twenty-eight million, four hundred sixty-five thousand, five hundred nineteen".