1621053 has 24 divisors (see below), whose sum is σ = 2778048. Its totient is φ = 925344.

The previous prime is 1621049. The next prime is 1621079. The reversal of 1621053 is 3501261.

It is not a de Polignac number, because 1621053 - 2² = 1621049 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1225 + ... + 2177.

It is an arithmetic number, because the mean of its divisors is an integer number (115752).

2^1621053 is an apocalyptic number.

It is an amenable number.

1621053 is a deficient number, since it is larger than the sum of its proper divisors (1156995).

1621053 is an frugal number, since it uses more digits than its factorization.

1621053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975 (or 963 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1621053 is about 1273.2057964053. The cubic root of 1621053 is about 117.4714703633.

The spelling of 1621053 in words is "one million, six hundred twenty-one thousand, fifty-three".