375221 has 12 divisors (see below), whose sum is σ = 472416. Its totient is φ = 291720.

The previous prime is 375209. The next prime is 375223. The reversal of 375221 is 122573.

375221 = T₁₃₄ + T₁₃₅ + ... + T₁₆₆.

375221 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 375221 - 2⁶ = 375157 is a prime.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 375193 and 375202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (375223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 626 + ... + 1068.

It is an arithmetic number, because the mean of its divisors is an integer number (39368).

2³⁷⁵²²¹ is an apocalyptic number.

It is an amenable number.

375221 is a deficient number, since it is larger than the sum of its proper divisors (97195).

375221 is a wasteful number, since it uses less digits than its factorization.

375221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 461 counting only the distinct ones).

The product of its digits is 420, while the sum is 20.

The square root of 375221 is about 612.5528548623. The cubic root of 375221 is about 72.1266418292.

Adding to 375221 its reverse (122573), we get a palindrome (497794).

It can be divided in two parts, 3752 and 21, that added together give a palindrome (3773).

The spelling of 375221 in words is "three hundred seventy-five thousand, two hundred twenty-one".