1220587365 has 16 divisors (see below), whose sum is σ = 1958544000. Its totient is φ = 649111872.

The previous prime is 1220587349. The next prime is 1220587373. The reversal of 1220587365 is 5637850221.

It is not a de Polignac number, because 1220587365 - 2⁴ = 1220587349 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111345 + ... + 121814.

It is an arithmetic number, because the mean of its divisors is an integer number (122409000).

Almost surely, 2^1220587365 is an apocalyptic number.

1220587365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220587365 is a deficient number, since it is larger than the sum of its proper divisors (737956635).

1220587365 is a wasteful number, since it uses less digits than its factorization.

1220587365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233516.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 1220587365 is about 34936.9054868917. The cubic root of 1220587365 is about 1068.7011826818.

The spelling of 1220587365 in words is "one billion, two hundred twenty million, five hundred eighty-seven thousand, three hundred sixty-five".