1287974523 has 16 divisors (see below), whose sum is σ = 1891971072. Its totient is φ = 772860000.

The previous prime is 1287974491. The next prime is 1287974563. The reversal of 1287974523 is 3254797821.

It is a happy number.

It is not a de Polignac number, because 1287974523 - 2⁵ = 1287974491 is a prime.

It is a super-4 number, since 4×1287974523⁴ (a number of 38 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1287974563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189883 + ... + 196548.

It is an arithmetic number, because the mean of its divisors is an integer number (118248192).

Almost surely, 2^1287974523 is an apocalyptic number.

1287974523 is a deficient number, since it is larger than the sum of its proper divisors (603996549).

1287974523 is a wasteful number, since it uses less digits than its factorization.

1287974523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386546.

The product of its digits is 846720, while the sum is 48.

The square root of 1287974523 is about 35888.3619436719. The cubic root of 1287974523 is about 1088.0171912270.

The spelling of 1287974523 in words is "one billion, two hundred eighty-seven million, nine hundred seventy-four thousand, five hundred twenty-three".