1021245541 has 8 divisors (see below), whose sum is σ = 1034256600. Its totient is φ = 1008268800.

The previous prime is 1021245503. The next prime is 1021245551. The reversal of 1021245541 is 1455421201.

It can be written as a sum of positive squares in 4 ways, for example, as 109809441 + 911436100 = 10479^2 + 30190^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021245541 - 2⁷ = 1021245413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021245551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54205 + ... + 70573.

It is an arithmetic number, because the mean of its divisors is an integer number (129282075).

Almost surely, 2^1021245541 is an apocalyptic number.

It is an amenable number.

1021245541 is a deficient number, since it is larger than the sum of its proper divisors (13011059).

1021245541 is an equidigital number, since it uses as much as digits as its factorization.

1021245541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17159.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1021245541 is about 31956.9325968560. The cubic root of 1021245541 is about 1007.0322781419.

Adding to 1021245541 its reverse (1455421201), we get a palindrome (2476666742).

The spelling of 1021245541 in words is "one billion, twenty-one million, two hundred forty-five thousand, five hundred forty-one".