133002421 has 2 divisors, whose sum is σ = 133002422. Its totient is φ = 133002420.

The previous prime is 133002409. The next prime is 133002427. The reversal of 133002421 is 124200331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123454321 + 9548100 = 11111^2 + 3090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133002421 is a prime.

It is a super-2 number, since 2×133002421² = 35379287983722482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133002395 and 133002404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133002427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66501210 + 66501211.

It is an arithmetic number, because the mean of its divisors is an integer number (66501211).

Almost surely, 2^133002421 is an apocalyptic number.

It is an amenable number.

133002421 is a deficient number, since it is larger than the sum of its proper divisors (1).

133002421 is an equidigital number, since it uses as much as digits as its factorization.

133002421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 133002421 is about 11532.6675578549. The cubic root of 133002421 is about 510.4499694041.

Adding to 133002421 its reverse (124200331), we get a palindrome (257202752).

The spelling of 133002421 in words is "one hundred thirty-three million, two thousand, four hundred twenty-one".