1025406769 has 4 divisors (see below), whose sum is σ = 1069989696. Its totient is φ = 980823844.

The previous prime is 1025406743. The next prime is 1025406773. The reversal of 1025406769 is 9676045201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1025406769 - 2¹⁷ = 1025275697 is a prime.

It is a super-2 number, since 2×1025406769² = 2102918083822038722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025406169) 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, 22291429 + ... + 22291474.

It is an arithmetic number, because the mean of its divisors is an integer number (267497424).

Almost surely, 2^1025406769 is an apocalyptic number.

It is an amenable number.

1025406769 is a deficient number, since it is larger than the sum of its proper divisors (44582927).

1025406769 is an equidigital number, since it uses as much as digits as its factorization.

1025406769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44582926.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1025406769 is about 32021.9732215240. The cubic root of 1025406769 is about 1008.3981958655.

The spelling of 1025406769 in words is "one billion, twenty-five million, four hundred six thousand, seven hundred sixty-nine".