2721542 has 8 divisors (see below), whose sum is σ = 4091256. Its totient is φ = 1357792.

The previous prime is 2721533. The next prime is 2721553. The reversal of 2721542 is 2451272.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 83 + ... + 2334.

It is an arithmetic number, because the mean of its divisors is an integer number (511407).

2^2721542 is an apocalyptic number.

2721542 is a deficient number, since it is larger than the sum of its proper divisors (1369714).

2721542 is a wasteful number, since it uses less digits than its factorization.

2721542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982.

The product of its digits is 1120, while the sum is 23.

The square root of 2721542 is about 1649.7096714271. The cubic root of 2721542 is about 139.6170144805.

The spelling of 2721542 in words is "two million, seven hundred twenty-one thousand, five hundred forty-two".