1552032421 has 4 divisors (see below), whose sum is σ = 1575197152. Its totient is φ = 1528867692.

The previous prime is 1552032397. The next prime is 1552032431. The reversal of 1552032421 is 1242302551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1552032421 - 2¹¹ = 1552030373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1552032431) 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, 11582265 + ... + 11582398.

It is an arithmetic number, because the mean of its divisors is an integer number (393799288).

Almost surely, 2^1552032421 is an apocalyptic number.

It is an amenable number.

1552032421 is a deficient number, since it is larger than the sum of its proper divisors (23164731).

1552032421 is an equidigital number, since it uses as much as digits as its factorization.

1552032421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23164730.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1552032421 is about 39395.8426867607. The cubic root of 1552032421 is about 1157.8001363789.

Adding to 1552032421 its reverse (1242302551), we get a palindrome (2794334972).

The spelling of 1552032421 in words is "one billion, five hundred fifty-two million, thirty-two thousand, four hundred twenty-one".