1621610122 has 8 divisors (see below), whose sum is σ = 2653543872. Its totient is φ = 737095500.

The previous prime is 1621610099. The next prime is 1621610129. The reversal of 1621610122 is 2210161261.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 73709551 = 1621610122 / (1 + 6 + 2 + 1 + 6 + 1 + 0 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 1621610093 and 1621610102.

It is not an unprimeable number, because it can be changed into a prime (1621610129) 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, 36854754 + ... + 36854797.

It is an arithmetic number, because the mean of its divisors is an integer number (331692984).

Almost surely, 2^1621610122 is an apocalyptic number.

1621610122 is a deficient number, since it is larger than the sum of its proper divisors (1031933750).

1621610122 is a wasteful number, since it uses less digits than its factorization.

1621610122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73709564.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1621610122 is about 40269.2205288357. The cubic root of 1621610122 is about 1174.8492631742.

Adding to 1621610122 its reverse (2210161261), we get a palindrome (3831771383).

The spelling of 1621610122 in words is "one billion, six hundred twenty-one million, six hundred ten thousand, one hundred twenty-two".