1025736449 has 4 divisors (see below), whose sum is σ = 1026750036. Its totient is φ = 1024722864.

The previous prime is 1025736407. The next prime is 1025736473. The reversal of 1025736449 is 9446375201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9446375201 = 37363 ⋅252827.

It can be written as a sum of positive squares in 2 ways, for example, as 23697424 + 1002039025 = 4868^2 + 31655^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025736449 - 2⁸ = 1025736193 is a prime.

It is a super-4 number, since 4×1025736449⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025736479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505274 + ... + 507299.

It is an arithmetic number, because the mean of its divisors is an integer number (256687509).

Almost surely, 2^1025736449 is an apocalyptic number.

It is an amenable number.

1025736449 is a deficient number, since it is larger than the sum of its proper divisors (1013587).

1025736449 is a wasteful number, since it uses less digits than its factorization.

1025736449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013586.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 1025736449 is about 32027.1205230817. The cubic root of 1025736449 is about 1008.5062548020.

The spelling of 1025736449 in words is "one billion, twenty-five million, seven hundred thirty-six thousand, four hundred forty-nine".