152421407 has 2 divisors, whose sum is σ = 152421408. Its totient is φ = 152421406.

The previous prime is 152421403. The next prime is 152421431. The reversal of 152421407 is 704124251.

It is a weak prime.

It is an emirp because it is prime and its reverse (704124251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 152421407 - 2² = 152421403 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152421403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76210703 + 76210704.

It is an arithmetic number, because the mean of its divisors is an integer number (76210704).

Almost surely, 2^152421407 is an apocalyptic number.

152421407 is a deficient number, since it is larger than the sum of its proper divisors (1).

152421407 is an equidigital number, since it uses as much as digits as its factorization.

152421407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 152421407 is about 12345.9064875772. The cubic root of 152421407 is about 534.1730690222.

Adding to 152421407 its reverse (704124251), we get a palindrome (856545658).

The spelling of 152421407 in words is "one hundred fifty-two million, four hundred twenty-one thousand, four hundred seven".