1621056146 has 16 divisors (see below), whose sum is σ = 2565820800. Its totient is φ = 766574688.

The previous prime is 1621056119. The next prime is 1621056149. The reversal of 1621056146 is 6416501261.

It is not an unprimeable number, because it can be changed into a prime (1621056149) 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, 193886 + ... + 202073.

It is an arithmetic number, because the mean of its divisors is an integer number (160363800).

Almost surely, 2^1621056146 is an apocalyptic number.

1621056146 is a deficient number, since it is larger than the sum of its proper divisors (944764654).

1621056146 is a wasteful number, since it uses less digits than its factorization.

1621056146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396073.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1621056146 is about 40262.3415364780. The cubic root of 1621056146 is about 1174.7154635607.

The spelling of 1621056146 in words is "one billion, six hundred twenty-one million, fifty-six thousand, one hundred forty-six".