1012143643 has 8 divisors (see below), whose sum is σ = 1176341760. Its totient is φ = 852847080.

The previous prime is 1012143619. The next prime is 1012143647. The reversal of 1012143643 is 3463412101.

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

It is a cyclic number.

It is not a de Polignac number, because 1012143643 - 2²¹ = 1010046491 is a prime.

It is a super-2 number, since 2×1012143643² = 2048869508130622898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012143647) 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, 1224943 + ... + 1225768.

It is an arithmetic number, because the mean of its divisors is an integer number (147042720).

Almost surely, 2^1012143643 is an apocalyptic number.

1012143643 is a deficient number, since it is larger than the sum of its proper divisors (164198117).

1012143643 is an equidigital number, since it uses as much as digits as its factorization.

1012143643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450777.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1012143643 is about 31814.2050505745. The cubic root of 1012143643 is about 1004.0316053156.

Adding to 1012143643 its reverse (3463412101), we get a palindrome (4475555744).

The spelling of 1012143643 in words is "one billion, twelve million, one hundred forty-three thousand, six hundred forty-three".