1391552 has 28 divisors (see below), whose sum is σ = 2926080. Its totient is φ = 654336.

The previous prime is 1391549. The next prime is 1391557. The reversal of 1391552 is 2551931.

1391552 = 34² + 35² + ... + 161².

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391557) 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, 449 + ... + 1727.

2^1391552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1391552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1463040).

1391552 is an abundant number, since it is smaller than the sum of its proper divisors (1534528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1391552 is a wasteful number, since it uses less digits than its factorization.

1391552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308 (or 1298 counting only the distinct ones).

The product of its digits is 1350, while the sum is 26.

The square root of 1391552 is about 1179.6406232408. The cubic root of 1391552 is about 111.6434237904.

The spelling of 1391552 in words is "one million, three hundred ninety-one thousand, five hundred fifty-two".