1621426334 has 8 divisors (see below), whose sum is σ = 2653243128. Its totient is φ = 737011960.

The previous prime is 1621426277. The next prime is 1621426343. The reversal of 1621426334 is 4336241261.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1621426334.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36850577 + ... + 36850620.

It is an arithmetic number, because the mean of its divisors is an integer number (331655391).

Almost surely, 2^1621426334 is an apocalyptic number.

1621426334 is a deficient number, since it is larger than the sum of its proper divisors (1031816794).

1621426334 is a wasteful number, since it uses less digits than its factorization.

1621426334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73701210.

The product of its digits is 20736, while the sum is 32.

The square root of 1621426334 is about 40266.9384731444. The cubic root of 1621426334 is about 1174.8048769700.

Adding to 1621426334 its reverse (4336241261), we get a palindrome (5957667595).

The spelling of 1621426334 in words is "one billion, six hundred twenty-one million, four hundred twenty-six thousand, three hundred thirty-four".