1145231540 has 24 divisors (see below), whose sum is σ = 2411700480. Its totient is φ = 456813728.

The previous prime is 1145231533. The next prime is 1145231569. The reversal of 1145231540 is 451325411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72572 + ... + 86931.

It is an arithmetic number, because the mean of its divisors is an integer number (100487520).

Almost surely, 2^1145231540 is an apocalyptic number.

1145231540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145231540 is an abundant number, since it is smaller than the sum of its proper divisors (1266468940).

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

1145231540 is a wasteful number, since it uses less digits than its factorization.

1145231540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159871 (or 159869 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1145231540 is about 33841.2697752315. The cubic root of 1145231540 is about 1046.2394700485.

Adding to 1145231540 its reverse (451325411), we get a palindrome (1596556951).

The spelling of 1145231540 in words is "one billion, one hundred forty-five million, two hundred thirty-one thousand, five hundred forty".