1021290545 has 16 divisors (see below), whose sum is σ = 1338259968. Its totient is φ = 742035840.

The previous prime is 1021290467. The next prime is 1021290547. The reversal of 1021290545 is 5450921201.

It is not a de Polignac number, because 1021290545 - 2²⁴ = 1004513329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021290547) 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 15 ways as a sum of consecutive naturals, for example, 51872 + ... + 68798.

It is an arithmetic number, because the mean of its divisors is an integer number (83641248).

Almost surely, 2^1021290545 is an apocalyptic number.

It is an amenable number.

1021290545 is a deficient number, since it is larger than the sum of its proper divisors (316969423).

1021290545 is a wasteful number, since it uses less digits than its factorization.

1021290545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18040.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1021290545 is about 31957.6367242636. The cubic root of 1021290545 is about 1007.0470704757.

The spelling of 1021290545 in words is "one billion, twenty-one million, two hundred ninety thousand, five hundred forty-five".