1142406 has 12 divisors (see below), whose sum is σ = 2475252. Its totient is φ = 380796.

The previous prime is 1142389. The next prime is 1142423. The reversal of 1142406 is 6042411.

It is an interprime number because it is at equal distance from previous prime (1142389) and next prime (1142423).

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 63467 = 1142406 / (1 + 1 + 4 + 2 + 4 + 0 + 6).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31716 + ... + 31751.

It is an arithmetic number, because the mean of its divisors is an integer number (206271).

2^1142406 is an apocalyptic number.

1142406 is an abundant number, since it is smaller than the sum of its proper divisors (1332846).

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

1142406 is a wasteful number, since it uses less digits than its factorization.

1142406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63475 (or 63472 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1142406 is about 1068.8339440718. The cubic root of 1142406 is about 104.5378326574.

Adding to 1142406 its reverse (6042411), we get a palindrome (7184817).

The spelling of 1142406 in words is "one million, one hundred forty-two thousand, four hundred six".