2142407 has 4 divisors (see below), whose sum is σ = 2157960. Its totient is φ = 2126856.

The previous prime is 2142403. The next prime is 2142431. The reversal of 2142407 is 7042412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2142407 - 2² = 2142403 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142403) 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, 7568 + ... + 7845.

It is an arithmetic number, because the mean of its divisors is an integer number (539490).

2^2142407 is an apocalyptic number.

2142407 is a deficient number, since it is larger than the sum of its proper divisors (15553).

2142407 is a wasteful number, since it uses less digits than its factorization.

2142407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15552.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 2142407 is about 1463.6963482909. The cubic root of 2142407 is about 128.9141708178.

Adding to 2142407 its reverse (7042412), we get a palindrome (9184819).

The spelling of 2142407 in words is "two million, one hundred forty-two thousand, four hundred seven".