2129542 has 4 divisors (see below), whose sum is σ = 3194316. Its totient is φ = 1064770.

The previous prime is 2129537. The next prime is 2129549. The reversal of 2129542 is 2459212.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532384 + ... + 532387.

It is an arithmetic number, because the mean of its divisors is an integer number (798579).

2^2129542 is an apocalyptic number.

2129542 is a deficient number, since it is larger than the sum of its proper divisors (1064774).

2129542 is a wasteful number, since it uses less digits than its factorization.

2129542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064773.

The product of its digits is 1440, while the sum is 25.

The square root of 2129542 is about 1459.2950352824. The cubic root of 2129542 is about 128.6556124747.

The spelling of 2129542 in words is "two million, one hundred twenty-nine thousand, five hundred forty-two".