1287387201 has 16 divisors (see below), whose sum is σ = 1736961408. Its totient is φ = 848064000.

The previous prime is 1287387181. The next prime is 1287387221. The reversal of 1287387201 is 1027837821.

It is an interprime number because it is at equal distance from previous prime (1287387181) and next prime (1287387221).

It is not a de Polignac number, because 1287387201 - 2¹¹ = 1287385153 is a prime.

It is a super-2 number, since 2×1287387201² = 3314731610597228802, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1287387201.

It is not an unprimeable number, because it can be changed into a prime (1287387221) 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, 200836 + ... + 207146.

It is an arithmetic number, because the mean of its divisors is an integer number (108560088).

Almost surely, 2^1287387201 is an apocalyptic number.

It is an amenable number.

1287387201 is a deficient number, since it is larger than the sum of its proper divisors (449574207).

1287387201 is an equidigital number, since it uses as much as digits as its factorization.

1287387201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7112.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 1287387201 is about 35880.1783858442. The cubic root of 1287387201 is about 1087.8517858877.

The spelling of 1287387201 in words is "one billion, two hundred eighty-seven million, three hundred eighty-seven thousand, two hundred one".