1285887451 has 2 divisors, whose sum is σ = 1285887452. Its totient is φ = 1285887450.

The previous prime is 1285887443. The next prime is 1285887457. The reversal of 1285887451 is 1547885821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1285887451 - 2³ = 1285887443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1285887395 and 1285887404.

It is not a weakly prime, because it can be changed into another prime (1285887457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642943725 + 642943726.

It is an arithmetic number, because the mean of its divisors is an integer number (642943726).

Almost surely, 2^1285887451 is an apocalyptic number.

1285887451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285887451 is an equidigital number, since it uses as much as digits as its factorization.

1285887451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 716800, while the sum is 49.

The square root of 1285887451 is about 35859.2728732751. The cubic root of 1285887451 is about 1087.4291884311.

The spelling of 1285887451 in words is "one billion, two hundred eighty-five million, eight hundred eighty-seven thousand, four hundred fifty-one".