1621479 has 8 divisors (see below), whose sum is σ = 2275840. Its totient is φ = 1024056.

The previous prime is 1621471. The next prime is 1621481. The reversal of 1621479 is 9741261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1621479 - 2³ = 1621471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14167 + ... + 14280.

It is an arithmetic number, because the mean of its divisors is an integer number (284480).

2^1621479 is an apocalyptic number.

1621479 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1621479 is a deficient number, since it is larger than the sum of its proper divisors (654361).

1621479 is a wasteful number, since it uses less digits than its factorization.

1621479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28469.

The product of its digits is 3024, while the sum is 30.

The square root of 1621479 is about 1273.3730796589. The cubic root of 1621479 is about 117.4817596554.

Adding to 1621479 its product of digits (3024), we get a triangular number (1624503 = T₁₈₀₂).

The spelling of 1621479 in words is "one million, six hundred twenty-one thousand, four hundred seventy-nine".