2921540 has 12 divisors (see below), whose sum is σ = 6135276. Its totient is φ = 1168608.

The previous prime is 2921539. The next prime is 2921561. The reversal of 2921540 is 451292.

It can be written as a sum of positive squares in 2 ways, for example, as 586756 + 2334784 = 766^2 + 1528^2 .

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, 73019 + ... + 73058.

It is an arithmetic number, because the mean of its divisors is an integer number (511273).

2^2921540 is an apocalyptic number.

2921540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2921540 is an abundant number, since it is smaller than the sum of its proper divisors (3213736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2921540 is a wasteful number, since it uses less digits than its factorization.

2921540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146086 (or 146084 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2921540 is about 1709.2512980835. The cubic root of 2921540 is about 142.9565127681.

The spelling of 2921540 in words is "two million, nine hundred twenty-one thousand, five hundred forty".