1621367 has 4 divisors (see below), whose sum is σ = 1768776. Its totient is φ = 1473960.

The previous prime is 1621363. The next prime is 1621369. The reversal of 1621367 is 7631261.

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

It is a cyclic number.

It is not a de Polignac number, because 1621367 - 2² = 1621363 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621363) 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, 73688 + ... + 73709.

It is an arithmetic number, because the mean of its divisors is an integer number (442194).

2^1621367 is an apocalyptic number.

1621367 is a deficient number, since it is larger than the sum of its proper divisors (147409).

1621367 is a wasteful number, since it uses less digits than its factorization.

1621367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147408.

The product of its digits is 1512, while the sum is 26.

The square root of 1621367 is about 1273.3291012146. The cubic root of 1621367 is about 117.4790546640.

The spelling of 1621367 in words is "one million, six hundred twenty-one thousand, three hundred sixty-seven".