2742621 has 16 divisors (see below), whose sum is σ = 4249728. Its totient is φ = 1540800.

The previous prime is 2742587. The next prime is 2742629. The reversal of 2742621 is 1262472.

It is not a de Polignac number, because 2742621 - 2¹⁰ = 2741597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2742591 and 2742600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2742629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211 + ... + 2351.

It is an arithmetic number, because the mean of its divisors is an integer number (265608).

2^2742621 is an apocalyptic number.

2742621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2742621 is a deficient number, since it is larger than the sum of its proper divisors (1507107).

2742621 is a wasteful number, since it uses less digits than its factorization.

2742621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212.

The product of its digits is 1344, while the sum is 24.

The square root of 2742621 is about 1656.0860484890. The cubic root of 2742621 is about 139.9765436893.

The spelling of 2742621 in words is "two million, seven hundred forty-two thousand, six hundred twenty-one".