157584421 has 2 divisors, whose sum is σ = 157584422. Its totient is φ = 157584420.

The previous prime is 157584391. The next prime is 157584451. The reversal of 157584421 is 124485751.

It is a balanced prime because it is at equal distance from previous prime (157584391) and next prime (157584451).

It can be written as a sum of positive squares in only one way, i.e., 155376225 + 2208196 = 12465^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 157584421 - 2¹⁷ = 157453349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157584451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78792210 + 78792211.

It is an arithmetic number, because the mean of its divisors is an integer number (78792211).

Almost surely, 2^157584421 is an apocalyptic number.

It is an amenable number.

157584421 is a deficient number, since it is larger than the sum of its proper divisors (1).

157584421 is an equidigital number, since it uses as much as digits as its factorization.

157584421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44800, while the sum is 37.

The square root of 157584421 is about 12553.2633605768. The cubic root of 157584421 is about 540.1376203882.

The spelling of 157584421 in words is "one hundred fifty-seven million, five hundred eighty-four thousand, four hundred twenty-one".