10420987 has 6 divisors (see below), whose sum is σ = 10998708. Its totient is φ = 9872172.

The previous prime is 10420961. The next prime is 10420997. The reversal of 10420987 is 78902401.

It is not a de Polignac number, because 10420987 - 2¹⁹ = 9896699 is a prime.

It is a super-3 number, since 3×10420987³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10420937) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14073 + ... + 14794.

It is an arithmetic number, because the mean of its divisors is an integer number (1833118).

Almost surely, 2^10420987 is an apocalyptic number.

10420987 is a deficient number, since it is larger than the sum of its proper divisors (577721).

10420987 is an equidigital number, since it uses as much as digits as its factorization.

10420987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28905 (or 28886 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 10420987 is about 3228.1553556172. The cubic root of 10420987 is about 218.4253052812.

The spelling of 10420987 in words is "ten million, four hundred twenty thousand, nine hundred eighty-seven".