1247142 has 32 divisors (see below), whose sum is σ = 2741760. Its totient is φ = 375840.

The previous prime is 1247119. The next prime is 1247167. The reversal of 1247142 is 2417421.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4467 + ... + 4737.

It is an arithmetic number, because the mean of its divisors is an integer number (85680).

2^1247142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1247142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1370880).

1247142 is an abundant number, since it is smaller than the sum of its proper divisors (1494618).

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

1247142 is a wasteful number, since it uses less digits than its factorization.

1247142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348.

The product of its digits is 448, while the sum is 21.

The square root of 1247142 is about 1116.7551208748. The cubic root of 1247142 is about 107.6395735275.

The spelling of 1247142 in words is "one million, two hundred forty-seven thousand, one hundred forty-two".