1020225691 has 8 divisors (see below), whose sum is σ = 1077359120. Its totient is φ = 963436032.

The previous prime is 1020225677. The next prime is 1020225749. The reversal of 1020225691 is 1965220201.

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 1020225691 - 2⁹ = 1020225179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020225631) 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, 79830 + ... + 91723.

It is an arithmetic number, because the mean of its divisors is an integer number (134669890).

Almost surely, 2^1020225691 is an apocalyptic number.

1020225691 is a deficient number, since it is larger than the sum of its proper divisors (57133429).

1020225691 is a wasteful number, since it uses less digits than its factorization.

1020225691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171885.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1020225691 is about 31940.9719795751. The cubic root of 1020225691 is about 1006.6969477731.

Adding to 1020225691 its reverse (1965220201), we get a palindrome (2985445892).

The spelling of 1020225691 in words is "one billion, twenty million, two hundred twenty-five thousand, six hundred ninety-one".