1042552421 has 4 divisors (see below), whose sum is σ = 1103879052. Its totient is φ = 981225792.

The previous prime is 1042552417. The next prime is 1042552481. The reversal of 1042552421 is 1242552401.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 571879396 + 470673025 = 23914^2 + 21695^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042552421 - 2² = 1042552417 is a prime.

It is a super-2 number, since 2×1042552421² = 2173831101065922482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042552481) 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, 30663290 + ... + 30663323.

It is an arithmetic number, because the mean of its divisors is an integer number (275969763).

Almost surely, 2^1042552421 is an apocalyptic number.

It is an amenable number.

1042552421 is a deficient number, since it is larger than the sum of its proper divisors (61326631).

1042552421 is an equidigital number, since it uses as much as digits as its factorization.

1042552421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61326630.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 1042552421 is about 32288.5803497150. The cubic root of 1042552421 is about 1013.9875758223.

The spelling of 1042552421 in words is "one billion, forty-two million, five hundred fifty-two thousand, four hundred twenty-one".