102154420 has 12 divisors (see below), whose sum is σ = 214524324. Its totient is φ = 40861760.

The previous prime is 102154417. The next prime is 102154421. The reversal of 102154420 is 24451201.

It can be written as a sum of positive squares in 2 ways, for example, as 81324324 + 20830096 = 9018^2 + 4564^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102154421) 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, 2553841 + ... + 2553880.

It is an arithmetic number, because the mean of its divisors is an integer number (17877027).

Almost surely, 2^102154420 is an apocalyptic number.

102154420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102154420 is an abundant number, since it is smaller than the sum of its proper divisors (112369904).

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

102154420 is a wasteful number, since it uses less digits than its factorization.

102154420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5107730 (or 5107728 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 102154420 is about 10107.1469762738. The cubic root of 102154420 is about 467.4685385903.

The spelling of 102154420 in words is "one hundred two million, one hundred fifty-four thousand, four hundred twenty".