102149506 has 4 divisors (see below), whose sum is σ = 153224262. Its totient is φ = 51074752.

The previous prime is 102149479. The next prime is 102149521. The reversal of 102149506 is 605941201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605941201 = 3889 ⋅155809.

It can be written as a sum of positive squares in only one way, i.e., 61074225 + 41075281 = 7815^2 + 6409^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25537375 + ... + 25537378.

Almost surely, 2^102149506 is an apocalyptic number.

102149506 is a deficient number, since it is larger than the sum of its proper divisors (51074756).

102149506 is an equidigital number, since it uses as much as digits as its factorization.

102149506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51074755.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 102149506 is about 10106.9038780430. The cubic root of 102149506 is about 467.4610428231.

The spelling of 102149506 in words is "one hundred two million, one hundred forty-nine thousand, five hundred six".