1020146865 has 16 divisors (see below), whose sum is σ = 1637490816. Its totient is φ = 542326400.

The previous prime is 1020146861. The next prime is 1020146867. The reversal of 1020146865 is 5686410201.

It is not a de Polignac number, because 1020146865 - 2² = 1020146861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020146861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104676 + ... + 114005.

It is an arithmetic number, because the mean of its divisors is an integer number (102343176).

Almost surely, 2^1020146865 is an apocalyptic number.

1020146865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020146865 is a deficient number, since it is larger than the sum of its proper divisors (617343951).

1020146865 is a wasteful number, since it uses less digits than its factorization.

1020146865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219000.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 1020146865 is about 31939.7380233464. The cubic root of 1020146865 is about 1006.6710201971.

The spelling of 1020146865 in words is "one billion, twenty million, one hundred forty-six thousand, eight hundred sixty-five".