1547442 has 48 divisors (see below), whose sum is σ = 3832920. Its totient is φ = 446976.

The previous prime is 1547437. The next prime is 1547449. The reversal of 1547442 is 2447451.

It can be written as a sum of positive squares in 4 ways, for example, as 1083681 + 463761 = 1041^2 + 681^2 .

It is not an unprimeable number, because it can be changed into a prime (1547449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3784 + ... + 4172.

2^1547442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1547442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1916460).

1547442 is an abundant number, since it is smaller than the sum of its proper divisors (2285478).

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

1547442 is a wasteful number, since it uses less digits than its factorization.

1547442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 424 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 1547442 is about 1243.9622180758. The cubic root of 1547442 is about 115.6657540293.

Subtracting 1547442 from its reverse (2447451), we obtain a palindrome (900009).

The spelling of 1547442 in words is "one million, five hundred forty-seven thousand, four hundred forty-two".