49251 has 4 divisors (see below), whose sum is σ = 65672. Its totient is φ = 32832.

The previous prime is 49223. The next prime is 49253. The reversal of 49251 is 15294.

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

It is not a de Polignac number, because 49251 - 2⁷ = 49123 is a prime.

It is a super-2 number, since 2×49251² = 4851322002, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 49251.

It is not an unprimeable number, because it can be changed into a prime (49253) 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, 8206 + ... + 8211.

It is an arithmetic number, because the mean of its divisors is an integer number (16418).

2⁴⁹²⁵¹ is an apocalyptic number.

49251 is a deficient number, since it is larger than the sum of its proper divisors (16421).

49251 is a wasteful number, since it uses less digits than its factorization.

49251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16420.

The product of its digits is 360, while the sum is 21.

The square root of 49251 is about 221.9256632298. The cubic root of 49251 is about 36.6554327385.

It can be divided in two parts, 49 and 251, that added together give a triangular number (300 = T₂₄).

The spelling of 49251 in words is "forty-nine thousand, two hundred fifty-one".