1387922 has 4 divisors (see below), whose sum is σ = 2081886. Its totient is φ = 693960.

The previous prime is 1387921. The next prime is 1387927. The reversal of 1387922 is 2297831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2297831 = 263 ⋅8737.

It can be written as a sum of positive squares in only one way, i.e., 1297321 + 90601 = 1139^2 + 301^2 .

It is a d-powerful number, because it can be written as 1 + 3¹² + 8⁵ + 7⁷ + 9 + 2⁵ + 2⁷ .

It is not an unprimeable number, because it can be changed into a prime (1387921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346979 + ... + 346982.

2^1387922 is an apocalyptic number.

1387922 is a deficient number, since it is larger than the sum of its proper divisors (693964).

1387922 is an equidigital number, since it uses as much as digits as its factorization.

1387922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693963.

The product of its digits is 6048, while the sum is 32.

The square root of 1387922 is about 1178.1010143447. The cubic root of 1387922 is about 111.5462616454.

Subtracting 1387922 from its reverse (2297831), we obtain a palindrome (909909).

The spelling of 1387922 in words is "one million, three hundred eighty-seven thousand, nine hundred twenty-two".