1621948 has 6 divisors (see below), whose sum is σ = 2838416. Its totient is φ = 810972.

The previous prime is 1621933. The next prime is 1621979. The reversal of 1621948 is 8491261.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202740 + ... + 202747.

2^1621948 is an apocalyptic number.

It is an amenable number.

1621948 is a deficient number, since it is larger than the sum of its proper divisors (1216468).

1621948 is a wasteful number, since it uses less digits than its factorization.

1621948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405491 (or 405489 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 1621948 is about 1273.5572228997. The cubic root of 1621948 is about 117.4930854540.

The spelling of 1621948 in words is "one million, six hundred twenty-one thousand, nine hundred forty-eight".