1552421 has 4 divisors (see below), whose sum is σ = 1671852. Its totient is φ = 1432992.

The previous prime is 1552417. The next prime is 1552451. The reversal of 1552421 is 1242551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1242551 = 613 ⋅2027.

It can be written as a sum of positive squares in 2 ways, for example, as 829921 + 722500 = 911^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1552421 - 2² = 1552417 is a prime.

It is a super-2 number, since 2×1552421² = 4820021922482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1552393 and 1552402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1552451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59696 + ... + 59721.

It is an arithmetic number, because the mean of its divisors is an integer number (417963).

2^1552421 is an apocalyptic number.

It is an amenable number.

1552421 is a deficient number, since it is larger than the sum of its proper divisors (119431).

1552421 is a wasteful number, since it uses less digits than its factorization.

1552421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119430.

The product of its digits is 400, while the sum is 20.

The square root of 1552421 is about 1245.9618774264. The cubic root of 1552421 is about 115.7896753621.

Adding to 1552421 its reverse (1242551), we get a palindrome (2794972).

The spelling of 1552421 in words is "one million, five hundred fifty-two thousand, four hundred twenty-one".