149251 has 2 divisors, whose sum is σ = 149252. Its totient is φ = 149250.

The previous prime is 149249. The next prime is 149257. The reversal of 149251 is 152941.

It is a weak prime.

It is an emirp because it is prime and its reverse (152941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149251 - 2¹ = 149249 is a prime.

It is a super-2 number, since 2×149251² = 44551722002, which contains 22 as substring.

Together with 149249, it forms a pair of twin primes.

It is equal to p₁₃₇₈₃ and since 149251 and 13783 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (149257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74625 + 74626.

It is an arithmetic number, because the mean of its divisors is an integer number (74626).

2¹⁴⁹²⁵¹ is an apocalyptic number.

149251 is a deficient number, since it is larger than the sum of its proper divisors (1).

149251 is an equidigital number, since it uses as much as digits as its factorization.

149251 is an odious number, because the sum of its binary digits is odd.

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

The square root of 149251 is about 386.3301696736. The cubic root of 149251 is about 53.0443440437.

It can be divided in two parts, 149 and 251, that added together give a square (400 = 20²).

The spelling of 149251 in words is "one hundred forty-nine thousand, two hundred fifty-one".