1621346441 has 16 divisors (see below), whose sum is σ = 1906632000. Its totient is φ = 1359261120.

The previous prime is 1621346393. The next prime is 1621346443. The reversal of 1621346441 is 1446431261.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1621346441 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1621346398 and 1621346407.

It is not an unprimeable number, because it can be changed into a prime (1621346443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161435 + ... + 171183.

It is an arithmetic number, because the mean of its divisors is an integer number (119164500).

Almost surely, 2^1621346441 is an apocalyptic number.

1621346441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1621346441 is a deficient number, since it is larger than the sum of its proper divisors (285285559).

1621346441 is a wasteful number, since it uses less digits than its factorization.

1621346441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10936.

The product of its digits is 13824, while the sum is 32.

The square root of 1621346441 is about 40265.9464187792. The cubic root of 1621346441 is about 1174.7855811550.

The spelling of 1621346441 in words is "one billion, six hundred twenty-one million, three hundred forty-six thousand, four hundred forty-one".