1398507 has 8 divisors (see below), whose sum is σ = 2034240. Its totient is φ = 847560.

The previous prime is 1398497. The next prime is 1398517. The reversal of 1398507 is 7058931.

It is an interprime number because it is at equal distance from previous prime (1398497) and next prime (1398517).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1398507 - 2⁸ = 1398251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 42379 = 1398507 / (1 + 3 + 9 + 8 + 5 + 0 + 7).

It is not an unprimeable number, because it can be changed into a prime (1398517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21157 + ... + 21222.

It is an arithmetic number, because the mean of its divisors is an integer number (254280).

2^1398507 is an apocalyptic number.

1398507 is a deficient number, since it is larger than the sum of its proper divisors (635733).

1398507 is a wasteful number, since it uses less digits than its factorization.

1398507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42393.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 1398507 is about 1182.5848806745. The cubic root of 1398507 is about 111.8291133353.

It can be divided in two parts, 139 and 8507, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 1398507 in words is "one million, three hundred ninety-eight thousand, five hundred seven".