1421587089 has 24 divisors (see below), whose sum is σ = 2234173032. Its totient is φ = 865797120.

The previous prime is 1421587081. The next prime is 1421587091. The reversal of 1421587089 is 9807851241.

It can be written as a sum of positive squares in 4 ways, for example, as 28804689 + 1392782400 = 5367^2 + 37320^2 .

It is not a de Polignac number, because 1421587089 - 2³ = 1421587081 is a prime.

It is a super-2 number, since 2×1421587089² = 4041819703222987842, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1421587081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51282 + ... + 73979.

It is an arithmetic number, because the mean of its divisors is an integer number (93090543).

Almost surely, 2^1421587089 is an apocalyptic number.

It is an amenable number.

1421587089 is a deficient number, since it is larger than the sum of its proper divisors (812585943).

1421587089 is a wasteful number, since it uses less digits than its factorization.

1421587089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125377 (or 125374 counting only the distinct ones).

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

The square root of 1421587089 is about 37703.9399665340. The cubic root of 1421587089 is about 1124.4094583599.

The spelling of 1421587089 in words is "one billion, four hundred twenty-one million, five hundred eighty-seven thousand, eighty-nine".