1243572473 has 12 divisors (see below), whose sum is σ = 1469009808. Its totient is φ = 1043555760.

The previous prime is 1243572469. The next prime is 1243572481. The reversal of 1243572473 is 3742753421.

It is not a de Polignac number, because 1243572473 - 2² = 1243572469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243572373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332615 + ... + 336332.

It is an arithmetic number, because the mean of its divisors is an integer number (122417484).

Almost surely, 2^1243572473 is an apocalyptic number.

1243572473 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1243572473 is a deficient number, since it is larger than the sum of its proper divisors (225437335).

1243572473 is a wasteful number, since it uses less digits than its factorization.

1243572473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668984 (or 668971 counting only the distinct ones).

The product of its digits is 141120, while the sum is 38.

The square root of 1243572473 is about 35264.3229482717. The cubic root of 1243572473 is about 1075.3678129877.

The spelling of 1243572473 in words is "one billion, two hundred forty-three million, five hundred seventy-two thousand, four hundred seventy-three".