87420045 has 32 divisors (see below), whose sum is σ = 148740480. Its totient is φ = 43718400.

The previous prime is 87420017. The next prime is 87420049. The reversal of 87420045 is 54002478.

87420045 = 2136² + 2137² + ... + 2154².

It is not a de Polignac number, because 87420045 - 2¹¹ = 87417997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87419994 and 87420021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87420049) 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, 27267 + ... + 30303.

It is an arithmetic number, because the mean of its divisors is an integer number (4648140).

Almost surely, 2^87420045 is an apocalyptic number.

It is an amenable number.

87420045 is a deficient number, since it is larger than the sum of its proper divisors (61320435).

87420045 is a wasteful number, since it uses less digits than its factorization.

87420045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 87420045 is about 9349.8687156559. The cubic root of 87420045 is about 443.8167361112.

The spelling of 87420045 in words is "eighty-seven million, four hundred twenty thousand, forty-five".