1001427261 has 8 divisors (see below), whose sum is σ = 1363645824. Its totient is φ = 653413440.

The previous prime is 1001427257. The next prime is 1001427263. The reversal of 1001427261 is 1627241001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1001427261 - 2² = 1001427257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001427263) 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, 3551020 + ... + 3551301.

It is an arithmetic number, because the mean of its divisors is an integer number (170455728).

Almost surely, 2^1001427261 is an apocalyptic number.

It is an amenable number.

1001427261 is a deficient number, since it is larger than the sum of its proper divisors (362218563).

1001427261 is an equidigital number, since it uses as much as digits as its factorization.

1001427261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7102371.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 1001427261 is about 31645.3355330608. The cubic root of 1001427261 is about 1000.4755275044.

Adding to 1001427261 its reverse (1627241001), we get a palindrome (2628668262).

The spelling of 1001427261 in words is "one billion, one million, four hundred twenty-seven thousand, two hundred sixty-one".