151251 has 4 divisors (see below), whose sum is σ = 201672. Its totient is φ = 100832.

The previous prime is 151247. The next prime is 151253. The reversal of 151251 is 152151.

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

It is a cyclic number.

It is not a de Polignac number, because 151251 - 2² = 151247 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 151251.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 151251.

It is not an unprimeable number, because it can be changed into a prime (151253) 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, 25206 + ... + 25211.

It is an arithmetic number, because the mean of its divisors is an integer number (50418).

2¹⁵¹²⁵¹ is an apocalyptic number.

151251 is a deficient number, since it is larger than the sum of its proper divisors (50421).

151251 is an equidigital number, since it uses as much as digits as its factorization.

151251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50420.

The product of its digits is 50, while the sum is 15.

The square root of 151251 is about 388.9100152992. The cubic root of 151251 is about 53.2802292598.

Subtracting 151251 from its reverse (152151), we obtain a square (900 = 30²).

The spelling of 151251 in words is "one hundred fifty-one thousand, two hundred fifty-one".