1428987501 has 24 divisors (see below), whose sum is σ = 2209602304. Its totient is φ = 921922560.

The previous prime is 1428987487. The next prime is 1428987509. The reversal of 1428987501 is 1057898241.

It is not a de Polignac number, because 1428987501 - 2²¹ = 1426890349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428987509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87316 + ... + 102381.

Almost surely, 2^1428987501 is an apocalyptic number.

It is an amenable number.

1428987501 is a deficient number, since it is larger than the sum of its proper divisors (780614803).

1428987501 is an equidigital number, since it uses as much as digits as its factorization.

1428987501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189743 (or 189731 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1428987501 is about 37801.9510210783. The cubic root of 1428987501 is about 1126.3572099914.

The spelling of 1428987501 in words is "one billion, four hundred twenty-eight million, nine hundred eighty-seven thousand, five hundred one".