1398747 has 16 divisors (see below), whose sum is σ = 2182400. Its totient is φ = 780192.

The previous prime is 1398737. The next prime is 1398763. The reversal of 1398747 is 7478931.

It is not a de Polignac number, because 1398747 - 2⁴ = 1398731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1398707) 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, 129 + ... + 1677.

It is an arithmetic number, because the mean of its divisors is an integer number (136400).

2^1398747 is an apocalyptic number.

1398747 is a deficient number, since it is larger than the sum of its proper divisors (783653).

1398747 is a wasteful number, since it uses less digits than its factorization.

1398747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602.

The product of its digits is 42336, while the sum is 39.

The square root of 1398747 is about 1182.6863489531. The cubic root of 1398747 is about 111.8355100264.

It can be divided in two parts, 1398 and 747, that added together give a triangular number (2145 = T₆₅).

The spelling of 1398747 in words is "one million, three hundred ninety-eight thousand, seven hundred forty-seven".