1387031 has 4 divisors (see below), whose sum is σ = 1410600. Its totient is φ = 1363464.

The previous prime is 1387021. The next prime is 1387037. The reversal of 1387031 is 1307831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387031 is a prime.

It is a super-2 number, since 2×1387031² = 3847709989922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1386988 and 1387006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11696 + ... + 11813.

It is an arithmetic number, because the mean of its divisors is an integer number (352650).

2^1387031 is an apocalyptic number.

1387031 is a deficient number, since it is larger than the sum of its proper divisors (23569).

1387031 is an equidigital number, since it uses as much as digits as its factorization.

1387031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23568.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1387031 is about 1177.7228027002. The cubic root of 1387031 is about 111.5223868661.

The spelling of 1387031 in words is "one million, three hundred eighty-seven thousand, thirty-one".