1000254661 has 4 divisors (see below), whose sum is σ = 1143148192. Its totient is φ = 857361132.

The previous prime is 1000254617. The next prime is 1000254719. The reversal of 1000254661 is 1664520001.

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 1000254661 - 2⁷ = 1000254533 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 (1000254361) 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, 71446755 + ... + 71446768.

It is an arithmetic number, because the mean of its divisors is an integer number (285787048).

Almost surely, 2^1000254661 is an apocalyptic number.

It is an amenable number.

1000254661 is a deficient number, since it is larger than the sum of its proper divisors (142893531).

1000254661 is an equidigital number, since it uses as much as digits as its factorization.

1000254661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142893530.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1000254661 is about 31626.8028893216. The cubic root of 1000254661 is about 1000.0848797952.

Adding to 1000254661 its reverse (1664520001), we get a palindrome (2664774662).

The spelling of 1000254661 in words is "one billion, two hundred fifty-four thousand, six hundred sixty-one".