102125541 has 16 divisors (see below), whose sum is σ = 158557824. Its totient is φ = 57255744.

The previous prime is 102125539. The next prime is 102125549. The reversal of 102125541 is 145521201.

It is not a de Polignac number, because 102125541 - 2¹ = 102125539 is a prime.

It is a super-2 number, since 2×102125541² = 20859252249085362, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102125549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44766 + ... + 46991.

It is an arithmetic number, because the mean of its divisors is an integer number (9909864).

Almost surely, 2^102125541 is an apocalyptic number.

It is an amenable number.

102125541 is a deficient number, since it is larger than the sum of its proper divisors (56432283).

102125541 is an equidigital number, since it uses as much as digits as its factorization.

102125541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91820.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 102125541 is about 10105.7182327631. The cubic root of 102125541 is about 467.4244834031.

Adding to 102125541 its reverse (145521201), we get a palindrome (247646742).

It can be divided in two parts, 10212 and 5541, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 102125541 in words is "one hundred two million, one hundred twenty-five thousand, five hundred forty-one".