1017621045 has 24 divisors (see below), whose sum is σ = 2015859456. Its totient is φ = 465198048.

The previous prime is 1017621043. The next prime is 1017621047. The reversal of 1017621045 is 5401267101.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1017621043) and next prime (1017621047).

It is not a de Polignac number, because 1017621045 - 2¹ = 1017621043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1017621043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1614957 + ... + 1615586.

It is an arithmetic number, because the mean of its divisors is an integer number (83994144).

Almost surely, 2^1017621045 is an apocalyptic number.

1017621045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1017621045 is a deficient number, since it is larger than the sum of its proper divisors (998238411).

1017621045 is a wasteful number, since it uses less digits than its factorization.

1017621045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3230561 (or 3230558 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 1017621045 is about 31900.1731186525. The cubic root of 1017621045 is about 1005.8395153514.

Adding to 1017621045 its reverse (5401267101), we get a palindrome (6418888146).

The spelling of 1017621045 in words is "one billion, seventeen million, six hundred twenty-one thousand, forty-five".