1125741021 has 12 divisors (see below), whose sum is σ = 1542657312. Its totient is φ = 730207728.

The previous prime is 1125741017. The next prime is 1125741061. The reversal of 1125741021 is 1201475211.

It is not a de Polignac number, because 1125741021 - 2² = 1125741017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1125740982 and 1125741000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125741011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132945 + ... + 141158.

It is an arithmetic number, because the mean of its divisors is an integer number (128554776).

Almost surely, 2^1125741021 is an apocalyptic number.

It is an amenable number.

1125741021 is a deficient number, since it is larger than the sum of its proper divisors (416916291).

1125741021 is an equidigital number, since it uses as much as digits as its factorization.

1125741021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274180 (or 274143 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 1125741021 is about 33552.0643329140. The cubic root of 1125741021 is about 1040.2702148577.

The spelling of 1125741021 in words is "one billion, one hundred twenty-five million, seven hundred forty-one thousand, twenty-one".