102055406 has 4 divisors (see below), whose sum is σ = 153083112. Its totient is φ = 51027702.

The previous prime is 102055399. The next prime is 102055409. The reversal of 102055406 is 604550201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604550201 = 43 ⋅14059307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102055409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25513850 + ... + 25513853.

It is an arithmetic number, because the mean of its divisors is an integer number (38270778).

Almost surely, 2^102055406 is an apocalyptic number.

102055406 is a deficient number, since it is larger than the sum of its proper divisors (51027706).

102055406 is an equidigital number, since it uses as much as digits as its factorization.

102055406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51027705.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 102055406 is about 10102.2475717040. The cubic root of 102055406 is about 467.3174572102.

The spelling of 102055406 in words is "one hundred two million, fifty-five thousand, four hundred six".