1621064 has 16 divisors (see below), whose sum is σ = 3072300. Its totient is φ = 801792.

The previous prime is 1621049. The next prime is 1621079. The reversal of 1621064 is 4601261.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1621049) and next prime (1621079).

It can be written as a sum of positive squares in 2 ways, for example, as 1562500 + 58564 = 1250^2 + 242^2 .

It is a super-3 number, since 3×1621064³ = 12779731763973330432, which contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269 + ... + 1820.

2^1621064 is an apocalyptic number.

It is an amenable number.

1621064 is a deficient number, since it is larger than the sum of its proper divisors (1451236).

1621064 is a wasteful number, since it uses less digits than its factorization.

1621064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192 (or 2188 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1621064 is about 1273.2101162023. The cubic root of 1621064 is about 117.4717360719.

The spelling of 1621064 in words is "one million, six hundred twenty-one thousand, sixty-four".