1045123540 has 24 divisors (see below), whose sum is σ = 2196181512. Its totient is φ = 417778560.

The previous prime is 1045123517. The next prime is 1045123549. The reversal of 1045123540 is 453215401.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 514926864 + 530196676 = 22692^2 + 23026^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045123549) 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, 16302 + ... + 48538.

It is an arithmetic number, because the mean of its divisors is an integer number (91507563).

Almost surely, 2^1045123540 is an apocalyptic number.

1045123540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1045123540 is an abundant number, since it is smaller than the sum of its proper divisors (1151057972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1045123540 is a wasteful number, since it uses less digits than its factorization.

1045123540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33867 (or 33865 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1045123540 is about 32328.3705126008. The cubic root of 1045123540 is about 1014.8204492027.

Adding to 1045123540 its reverse (453215401), we get a palindrome (1498338941).

The spelling of 1045123540 in words is "one billion, forty-five million, one hundred twenty-three thousand, five hundred forty".