102149427 has 4 divisors (see below), whose sum is σ = 136199240. Its totient is φ = 68099616.

The previous prime is 102149423. The next prime is 102149429. The reversal of 102149427 is 724941201.

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

It is not a de Polignac number, because 102149427 - 2² = 102149423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102149394 and 102149403.

It is not an unprimeable number, because it can be changed into a prime (102149423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17024902 + ... + 17024907.

It is an arithmetic number, because the mean of its divisors is an integer number (34049810).

Almost surely, 2^102149427 is an apocalyptic number.

102149427 is a deficient number, since it is larger than the sum of its proper divisors (34049813).

102149427 is an equidigital number, since it uses as much as digits as its factorization.

102149427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34049812.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 102149427 is about 10106.8999698226. The cubic root of 102149427 is about 467.4609223153.

The spelling of 102149427 in words is "one hundred two million, one hundred forty-nine thousand, four hundred twenty-seven".