1055421 has 6 divisors (see below), whose sum is σ = 1524510. Its totient is φ = 703608.

The previous prime is 1055413. The next prime is 1055423. The reversal of 1055421 is 1245501.

It can be written as a sum of positive squares in only one way, i.e., 1028196 + 27225 = 1014^2 + 165^2 .

It is not a de Polignac number, because 1055421 - 2³ = 1055413 is a prime.

It is a super-2 number, since 2×1055421² = 2227826974482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1055394 and 1055403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58626 + ... + 58643.

It is an arithmetic number, because the mean of its divisors is an integer number (254085).

2^1055421 is an apocalyptic number.

It is an amenable number.

1055421 is a deficient number, since it is larger than the sum of its proper divisors (469089).

1055421 is a wasteful number, since it uses less digits than its factorization.

1055421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117275 (or 117272 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1055421 is about 1027.3368483608. The cubic root of 1055421 is about 101.8142524912.

The spelling of 1055421 in words is "one million, fifty-five thousand, four hundred twenty-one".