1125078621 has 8 divisors (see below), whose sum is σ = 1532022144. Its totient is φ = 734093760.

The previous prime is 1125078593. The next prime is 1125078631. The reversal of 1125078621 is 1268705211.

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

It is not a de Polignac number, because 1125078621 - 2⁹ = 1125078109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125078631) 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, 3989500 + ... + 3989781.

It is an arithmetic number, because the mean of its divisors is an integer number (191502768).

Almost surely, 2^1125078621 is an apocalyptic number.

It is an amenable number.

1125078621 is a deficient number, since it is larger than the sum of its proper divisors (406943523).

1125078621 is an equidigital number, since it uses as much as digits as its factorization.

1125078621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7979331.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 1125078621 is about 33542.1916546907. The cubic root of 1125078621 is about 1040.0661388535.

The spelling of 1125078621 in words is "one billion, one hundred twenty-five million, seventy-eight thousand, six hundred twenty-one".