102151849 has 4 divisors (see below), whose sum is σ = 102175236. Its totient is φ = 102128464.

The previous prime is 102151843. The next prime is 102151871. The reversal of 102151849 is 948151201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 948151201 = 29 ⋅32694869.

It can be written as a sum of positive squares in 2 ways, for example, as 71149225 + 31002624 = 8435^2 + 5568^2 .

It is a cyclic number.

It is not a de Polignac number, because 102151849 - 2⁵ = 102151817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102151849.

It is not an unprimeable number, because it can be changed into a prime (102151843) 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, 2974 + ... + 14599.

It is an arithmetic number, because the mean of its divisors is an integer number (25543809).

Almost surely, 2^102151849 is an apocalyptic number.

It is an amenable number.

102151849 is a deficient number, since it is larger than the sum of its proper divisors (23387).

102151849 is an equidigital number, since it uses as much as digits as its factorization.

102151849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23386.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 102151849 is about 10107.0197882462. The cubic root of 102151849 is about 467.4646168422.

The spelling of 102151849 in words is "one hundred two million, one hundred fifty-one thousand, eight hundred forty-nine".