1620367 has 4 divisors (see below), whose sum is σ = 1851856. Its totient is φ = 1388880.

The previous prime is 1620347. The next prime is 1620371. The reversal of 1620367 is 7630261.

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 1620367 - 2⁷ = 1620239 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 (1620337) 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, 115734 + ... + 115747.

It is an arithmetic number, because the mean of its divisors is an integer number (462964).

2^1620367 is an apocalyptic number.

1620367 is a deficient number, since it is larger than the sum of its proper divisors (231489).

1620367 is an equidigital number, since it uses as much as digits as its factorization.

1620367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231488.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 1620367 is about 1272.9363691874. The cubic root of 1620367 is about 117.4548974322.

It can be divided in two parts, 16203 and 67, that multiplied together give a triangular number (1085601 = T₁₄₇₃).

The spelling of 1620367 in words is "one million, six hundred twenty thousand, three hundred sixty-seven".