1021522045 has 16 divisors (see below), whose sum is σ = 1240842240. Its totient is φ = 807251904.

The previous prime is 1021522037. The next prime is 1021522057. The reversal of 1021522045 is 5402251201.

It is a cyclic number.

It is not a de Polignac number, because 1021522045 - 2³ = 1021522037 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 196996 + ... + 202114.

It is an arithmetic number, because the mean of its divisors is an integer number (77552640).

Almost surely, 2^1021522045 is an apocalyptic number.

It is an amenable number.

1021522045 is a deficient number, since it is larger than the sum of its proper divisors (219320195).

1021522045 is a wasteful number, since it uses less digits than its factorization.

1021522045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5604.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1021522045 is about 31961.2585015046. The cubic root of 1021522045 is about 1007.1231551855.

Adding to 1021522045 its reverse (5402251201), we get a palindrome (6423773246).

The spelling of 1021522045 in words is "one billion, twenty-one million, five hundred twenty-two thousand, forty-five".