1021135545 has 32 divisors (see below), whose sum is σ = 1859639040. Its totient is φ = 531319680.

The previous prime is 1021135541. The next prime is 1021135571. The reversal of 1021135545 is 5455311201.

1021135545 is a `hidden beast` number, since 1 + 0 + 2 + 113 + 5 + 545 = 666.

It is not a de Polignac number, because 1021135545 - 2² = 1021135541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1021135541) 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, 86709 + ... + 97778.

It is an arithmetic number, because the mean of its divisors is an integer number (58113720).

Almost surely, 2^1021135545 is an apocalyptic number.

1021135545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021135545 is a deficient number, since it is larger than the sum of its proper divisors (838503495).

1021135545 is a wasteful number, since it uses less digits than its factorization.

1021135545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184542 (or 184536 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1021135545 is about 31955.2115467884. The cubic root of 1021135545 is about 1006.9961218030.

Adding to 1021135545 its reverse (5455311201), we get a palindrome (6476446746).

The spelling of 1021135545 in words is "one billion, twenty-one million, one hundred thirty-five thousand, five hundred forty-five".