1421153261 has 8 divisors (see below), whose sum is σ = 1560618048. Its totient is φ = 1283400000.

The previous prime is 1421153219. The next prime is 1421153309. The reversal of 1421153261 is 1623511241.

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 1421153261 - 2²² = 1416958957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1421153261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421153761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426140 + ... + 429461.

It is an arithmetic number, because the mean of its divisors is an integer number (195077256).

Almost surely, 2^1421153261 is an apocalyptic number.

1421153261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1421153261 is a deficient number, since it is larger than the sum of its proper divisors (139464787).

1421153261 is a wasteful number, since it uses less digits than its factorization.

1421153261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855763.

The product of its digits is 1440, while the sum is 26.

The square root of 1421153261 is about 37698.1864417905. The cubic root of 1421153261 is about 1124.2950674467.

The spelling of 1421153261 in words is "one billion, four hundred twenty-one million, one hundred fifty-three thousand, two hundred sixty-one".