102150661 has 4 divisors (see below), whose sum is σ = 103825324. Its totient is φ = 100476000.

The previous prime is 102150623. The next prime is 102150667. The reversal of 102150661 is 166051201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166051201 = 1481 ⋅112121.

It can be written as a sum of positive squares in 2 ways, for example, as 10278436 + 91872225 = 3206^2 + 9585^2 .

It is a cyclic number.

It is not a de Polignac number, because 102150661 - 2¹⁹ = 101626373 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 (102150667) 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, 837240 + ... + 837361.

It is an arithmetic number, because the mean of its divisors is an integer number (25956331).

Almost surely, 2^102150661 is an apocalyptic number.

It is an amenable number.

102150661 is a deficient number, since it is larger than the sum of its proper divisors (1674663).

102150661 is an equidigital number, since it uses as much as digits as its factorization.

102150661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674662.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 102150661 is about 10106.9610170417. The cubic root of 102150661 is about 467.4628046704.

It can be divided in two parts, 1021506 and 61, that multiplied together give a triangular number (62311866 = T₁₁₁₆₃).

The spelling of 102150661 in words is "one hundred two million, one hundred fifty thousand, six hundred sixty-one".