128250415 has 16 divisors (see below), whose sum is σ = 162802368. Its totient is φ = 96788736.

The previous prime is 128250403. The next prime is 128250427. The reversal of 128250415 is 514052821.

It is an interprime number because it is at equal distance from previous prime (128250403) and next prime (128250427).

It is a cyclic number.

It is not a de Polignac number, because 128250415 - 2²¹ = 126153263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 757 + ... + 16033.

It is an arithmetic number, because the mean of its divisors is an integer number (10175148).

Almost surely, 2^128250415 is an apocalyptic number.

128250415 is a deficient number, since it is larger than the sum of its proper divisors (34551953).

128250415 is a wasteful number, since it uses less digits than its factorization.

128250415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15378.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 128250415 is about 11324.7699755889. The cubic root of 128250415 is about 504.2968549646.

The spelling of 128250415 in words is "one hundred twenty-eight million, two hundred fifty thousand, four hundred fifteen".