1021449245 has 6 divisors (see below), whose sum is σ = 1225824858. Its totient is φ = 817102224.

The previous prime is 1021449203. The next prime is 1021449257. The reversal of 1021449245 is 5429441201.

It can be written as a sum of positive squares in 3 ways, for example, as 158206084 + 863243161 = 12578^2 + 29381^2 .

It is not a de Polignac number, because 1021449245 - 2¹⁰ = 1021448221 is a prime.

It is a super-2 number, since 2×1021449245² = 2086717120222140050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64319 + ... + 78611.

It is an arithmetic number, because the mean of its divisors is an integer number (204304143).

Almost surely, 2^1021449245 is an apocalyptic number.

It is an amenable number.

1021449245 is a deficient number, since it is larger than the sum of its proper divisors (204375613).

1021449245 is an frugal number, since it uses more digits than its factorization.

1021449245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28591 (or 14298 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1021449245 is about 31960.1196024045. The cubic root of 1021449245 is about 1007.0992300019.

Multiplying 1021449245 by its product of nonzero digits (11520), we get a square (11767095302400 = 3430320²).

The spelling of 1021449245 in words is "one billion, twenty-one million, four hundred forty-nine thousand, two hundred forty-five".