1012543254 has 40 divisors (see below), whose sum is σ = 2272263840. Its totient is φ = 337006224.

The previous prime is 1012543201. The next prime is 1012543267. The reversal of 1012543254 is 4523452101.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 112132 + ... + 120824.

It is an arithmetic number, because the mean of its divisors is an integer number (56806596).

Almost surely, 2^1012543254 is an apocalyptic number.

1012543254 is an abundant number, since it is smaller than the sum of its proper divisors (1259720586).

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

1012543254 is an equidigital number, since it uses as much as digits as its factorization.

1012543254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9426 (or 9417 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1012543254 is about 31820.4848171740. The cubic root of 1012543254 is about 1004.1637240075.

Adding to 1012543254 its reverse (4523452101), we get a palindrome (5535995355).

The spelling of 1012543254 in words is "one billion, twelve million, five hundred forty-three thousand, two hundred fifty-four".