102123040 has 24 divisors (see below), whose sum is σ = 241266060. Its totient is φ = 40849152.

The previous prime is 102123023. The next prime is 102123053. The reversal of 102123040 is 40321201.

It can be written as a sum of positive squares in 2 ways, for example, as 101848464 + 274576 = 10092^2 + 524^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 102123040.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318975 + ... + 319294.

Almost surely, 2^102123040 is an apocalyptic number.

102123040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102123040 is an abundant number, since it is smaller than the sum of its proper divisors (139143020).

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

102123040 is an equidigital number, since it uses as much as digits as its factorization.

102123040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638284 (or 638276 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 102123040 is about 10105.5944901822. The cubic root of 102123040 is about 467.4206677132.

Adding to 102123040 its reverse (40321201), we get a palindrome (142444241).

The spelling of 102123040 in words is "one hundred two million, one hundred twenty-three thousand, forty".