7420987 has 8 divisors (see below), whose sum is σ = 8608256. Its totient is φ = 6265512.

The previous prime is 7420969. The next prime is 7421003. The reversal of 7420987 is 7890247.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 7420987 - 2¹⁵ = 7388219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7420187) 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 7 ways as a sum of consecutive naturals, for example, 7443 + ... + 8380.

It is an arithmetic number, because the mean of its divisors is an integer number (1076032).

Almost surely, 2^7420987 is an apocalyptic number.

7420987 is a deficient number, since it is larger than the sum of its proper divisors (1187269).

7420987 is a wasteful number, since it uses less digits than its factorization.

7420987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15897.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 7420987 is about 2724.1488579004. The cubic root of 7420987 is about 195.0535640712.

The spelling of 7420987 in words is "seven million, four hundred twenty thousand, nine hundred eighty-seven".