1142405 has 8 divisors (see below), whose sum is σ = 1495584. Its totient is φ = 830800.

The previous prime is 1142389. The next prime is 1142423. The reversal of 1142405 is 5042411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1142405 - 2⁴ = 1142389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10331 + ... + 10440.

It is an arithmetic number, because the mean of its divisors is an integer number (186948).

2^1142405 is an apocalyptic number.

It is an amenable number.

1142405 is a deficient number, since it is larger than the sum of its proper divisors (353179).

1142405 is a wasteful number, since it uses less digits than its factorization.

1142405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20787.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1142405 is about 1068.8334762721. The cubic root of 1142405 is about 104.5378021551.

Adding to 1142405 its reverse (5042411), we get a palindrome (6184816).

It can be divided in two parts, 114 and 2405, that multiplied together give a triangular number (274170 = T₇₄₀).

The spelling of 1142405 in words is "one million, one hundred forty-two thousand, four hundred five".