75421487 has 2 divisors, whose sum is σ = 75421488. Its totient is φ = 75421486.

The previous prime is 75421453. The next prime is 75421513. The reversal of 75421487 is 78412457.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75421487 - 2¹⁴ = 75405103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75421487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75421987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37710743 + 37710744.

It is an arithmetic number, because the mean of its divisors is an integer number (37710744).

Almost surely, 2^75421487 is an apocalyptic number.

75421487 is a deficient number, since it is larger than the sum of its proper divisors (1).

75421487 is an equidigital number, since it uses as much as digits as its factorization.

75421487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62720, while the sum is 38.

The square root of 75421487 is about 8684.5545078605. The cubic root of 75421487 is about 422.5048482807.

The spelling of 75421487 in words is "seventy-five million, four hundred twenty-one thousand, four hundred eighty-seven".