102045541 has 4 divisors (see below), whose sum is σ = 109895212. Its totient is φ = 94195872.

The previous prime is 102045539. The next prime is 102045547. The reversal of 102045541 is 145540201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64480900 + 37564641 = 8030^2 + 6129^2 .

It is a cyclic number.

It is not a de Polignac number, because 102045541 - 2¹ = 102045539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102045547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3924816 + ... + 3924841.

It is an arithmetic number, because the mean of its divisors is an integer number (27473803).

Almost surely, 2^102045541 is an apocalyptic number.

It is an amenable number.

102045541 is a deficient number, since it is larger than the sum of its proper divisors (7849671).

102045541 is an equidigital number, since it uses as much as digits as its factorization.

102045541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7849670.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 102045541 is about 10101.7593022206. The cubic root of 102045541 is about 467.3023992613.

Adding to 102045541 its reverse (145540201), we get a palindrome (247585742).

The spelling of 102045541 in words is "one hundred two million, forty-five thousand, five hundred forty-one".