1025158661 has 8 divisors (see below), whose sum is σ = 1085990880. Its totient is φ = 965014128.

The previous prime is 1025158639. The next prime is 1025158681. The reversal of 1025158661 is 1668515201.

It is a happy number.

1025158661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1025158661 - 2¹⁸ = 1024896517 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 (1025158601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168851 + ... + 174816.

It is an arithmetic number, because the mean of its divisors is an integer number (135748860).

Almost surely, 2^1025158661 is an apocalyptic number.

It is an amenable number.

1025158661 is a deficient number, since it is larger than the sum of its proper divisors (60832219).

1025158661 is a wasteful number, since it uses less digits than its factorization.

1025158661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343843.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 1025158661 is about 32018.0989598071. The cubic root of 1025158661 is about 1008.3168584396.

The spelling of 1025158661 in words is "one billion, twenty-five million, one hundred fifty-eight thousand, six hundred sixty-one".