1287672 has 16 divisors (see below), whose sum is σ = 3219240. Its totient is φ = 429216.

The previous prime is 1287661. The next prime is 1287683. The reversal of 1287672 is 2767821.

It is an interprime number because it is at equal distance from previous prime (1287661) and next prime (1287683).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26803 + ... + 26850.

2^1287672 is an apocalyptic number.

1287672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1287672 is an abundant number, since it is smaller than the sum of its proper divisors (1931568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1287672 is a wasteful number, since it uses less digits than its factorization.

1287672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53662 (or 53658 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 1287672 is about 1134.7563615155. The cubic root of 1287672 is about 108.7931999066.

The spelling of 1287672 in words is "one million, two hundred eighty-seven thousand, six hundred seventy-two".