1388497 has 4 divisors (see below), whose sum is σ = 1514736. Its totient is φ = 1262260.

The previous prime is 1388483. The next prime is 1388587. The reversal of 1388497 is 7948831.

1388497 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1388497 - 2⁷ = 1388369 is a prime.

It is a super-3 number, since 3×1388497³ = 8030749733316718419, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388467) 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, 63103 + ... + 63124.

It is an arithmetic number, because the mean of its divisors is an integer number (378684).

2^1388497 is an apocalyptic number.

It is an amenable number.

1388497 is a deficient number, since it is larger than the sum of its proper divisors (126239).

1388497 is a wasteful number, since it uses less digits than its factorization.

1388497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126238.

The product of its digits is 48384, while the sum is 40.

The square root of 1388497 is about 1178.3450258732. The cubic root of 1388497 is about 111.5616636265.

The spelling of 1388497 in words is "one million, three hundred eighty-eight thousand, four hundred ninety-seven".