102045040 has 20 divisors (see below), whose sum is σ = 237254904. Its totient is φ = 40817984.

The previous prime is 102045017. The next prime is 102045049. The reversal of 102045040 is 40540201.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102045049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637702 + ... + 637861.

Almost surely, 2^102045040 is an apocalyptic number.

102045040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102045040 is an abundant number, since it is smaller than the sum of its proper divisors (135209864).

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

102045040 is a wasteful number, since it uses less digits than its factorization.

102045040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275576 (or 1275570 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 102045040 is about 10101.7345045294. The cubic root of 102045040 is about 467.3016345083.

Adding to 102045040 its reverse (40540201), we get a palindrome (142585241).

The spelling of 102045040 in words is "one hundred two million, forty-five thousand, forty".