621494 has 4 divisors (see below), whose sum is σ = 932244. Its totient is φ = 310746.

The previous prime is 621473. The next prime is 621521. The reversal of 621494 is 494126.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155372 + ... + 155375.

It is an arithmetic number, because the mean of its divisors is an integer number (233061).

2⁶²¹⁴⁹⁴ is an apocalyptic number.

621494 is a deficient number, since it is larger than the sum of its proper divisors (310750).

621494 is a wasteful number, since it uses less digits than its factorization.

621494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310749.

The product of its digits is 1728, while the sum is 26.

The square root of 621494 is about 788.3489075276. The cubic root of 621494 is about 85.3386261094.

The spelling of 621494 in words is "six hundred twenty-one thousand, four hundred ninety-four".