1247540534 has 16 divisors (see below), whose sum is σ = 1891890000. Its totient is φ = 616931424.

The previous prime is 1247540527. The next prime is 1247540543. The reversal of 1247540534 is 4350457421.

It is a junction number, because it is equal to n+sod(n) for n = 1247540494 and 1247540503.

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, 123092 + ... + 132840.

It is an arithmetic number, because the mean of its divisors is an integer number (118243125).

Almost surely, 2^1247540534 is an apocalyptic number.

1247540534 is a deficient number, since it is larger than the sum of its proper divisors (644349466).

1247540534 is a wasteful number, since it uses less digits than its factorization.

1247540534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10447.

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 1247540534 is about 35320.5398316617. The cubic root of 1247540534 is about 1076.5103799620.

Adding to 1247540534 its reverse (4350457421), we get a palindrome (5597997955).

The spelling of 1247540534 in words is "one billion, two hundred forty-seven million, five hundred forty thousand, five hundred thirty-four".