1621130 has 16 divisors (see below), whose sum is σ = 3335040. Its totient is φ = 555792.

The previous prime is 1621127. The next prime is 1621133. The reversal of 1621130 is 311261.

It is an interprime number because it is at equal distance from previous prime (1621127) and next prime (1621133).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1621133) 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, 11510 + ... + 11649.

It is an arithmetic number, because the mean of its divisors is an integer number (208440).

2^1621130 is an apocalyptic number.

1621130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1621130 is an abundant number, since it is smaller than the sum of its proper divisors (1713910).

1621130 is a wasteful number, since it uses less digits than its factorization.

1621130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23173.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1621130 is about 1273.2360346770. The cubic root of 1621130 is about 117.4733302984.

Adding to 1621130 its reverse (311261), we get a palindrome (1932391).

The spelling of 1621130 in words is "one million, six hundred twenty-one thousand, one hundred thirty".