1165425408 has 540 divisors, whose sum is σ = 4285630272. Its totient is φ = 313528320.

The previous prime is 1165425397. The next prime is 1165425409. The reversal of 1165425408 is 8045245611.

It is a happy number.

1165425408 is a `hidden beast` number, since 11 + 65 + 42 + 540 + 8 = 666.

It is a super-2 number, since 2×1165425408² = 2716432763223932928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1165425409) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 31497966 + ... + 31498002.

Almost surely, 2^1165425408 is an apocalyptic number.

1165425408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1165425408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2142815136).

1165425408 is an abundant number, since it is smaller than the sum of its proper divisors (3120204864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165425408 is an equidigital number, since it uses as much as digits as its factorization.

1165425408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 1165425408 is about 34138.3275513022. The cubic root of 1165425408 is about 1052.3531225503.

The spelling of 1165425408 in words is "one billion, one hundred sixty-five million, four hundred twenty-five thousand, four hundred eight".