1055621 has 8 divisors (see below), whose sum is σ = 1270080. Its totient is φ = 857088.

The previous prime is 1055611. The next prime is 1055671. The reversal of 1055621 is 1265501.

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

It is a cyclic number.

It is not a de Polignac number, because 1055621 - 2¹⁰ = 1054597 is a prime.

It is a super-2 number, since 2×1055621² = 2228671391282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1055593 and 1055602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055611) 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, 3836 + ... + 4101.

It is an arithmetic number, because the mean of its divisors is an integer number (158760).

2^1055621 is an apocalyptic number.

It is an amenable number.

1055621 is a deficient number, since it is larger than the sum of its proper divisors (214459).

1055621 is an equidigital number, since it uses as much as digits as its factorization.

1055621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7963.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1055621 is about 1027.4341828069. The cubic root of 1055621 is about 101.8206832786.

The spelling of 1055621 in words is "one million, fifty-five thousand, six hundred twenty-one".