1521421151 has 2 divisors, whose sum is σ = 1521421152. Its totient is φ = 1521421150.

The previous prime is 1521421133. The next prime is 1521421159. The reversal of 1521421151 is 1511241251.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1521421151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1521421159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760710575 + 760710576.

It is an arithmetic number, because the mean of its divisors is an integer number (760710576).

Almost surely, 2^1521421151 is an apocalyptic number.

1521421151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521421151 is an equidigital number, since it uses as much as digits as its factorization.

1521421151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 400, while the sum is 23.

The square root of 1521421151 is about 39005.3989980874. The cubic root of 1521421151 is about 1150.1376397324.

The spelling of 1521421151 in words is "one billion, five hundred twenty-one million, four hundred twenty-one thousand, one hundred fifty-one".