2487380721 has 32 divisors (see below), whose sum is σ = 4151658240. Its totient is φ = 1291616256.

The previous prime is 2487380717. The next prime is 2487380723. The reversal of 2487380721 is 1270837842.

It is not a de Polignac number, because 2487380721 - 2² = 2487380717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2487380723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109776 + ... + 130481.

It is an arithmetic number, because the mean of its divisors is an integer number (129739320).

Almost surely, 2^2487380721 is an apocalyptic number.

2487380721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2487380721 is a deficient number, since it is larger than the sum of its proper divisors (1664277519).

2487380721 is a wasteful number, since it uses less digits than its factorization.

2487380721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240313.

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 2487380721 is about 49873.6475606106. The cubic root of 2487380721 is about 1354.9213556204.

The spelling of 2487380721 in words is "two billion, four hundred eighty-seven million, three hundred eighty thousand, seven hundred twenty-one".