1247406734 has 32 divisors (see below), whose sum is σ = 2276294400. Its totient is φ = 500765760.

The previous prime is 1247406709. The next prime is 1247406763. The reversal of 1247406734 is 4376047421.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2672 + ... + 50019.

It is an arithmetic number, because the mean of its divisors is an integer number (71134200).

Almost surely, 2^1247406734 is an apocalyptic number.

1247406734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1247406734 is a deficient number, since it is larger than the sum of its proper divisors (1028887666).

1247406734 is a wasteful number, since it uses less digits than its factorization.

1247406734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52808.

The product of its (nonzero) digits is 112896, while the sum is 38.

The square root of 1247406734 is about 35318.6456988373. The cubic root of 1247406734 is about 1076.4718929725.

The spelling of 1247406734 in words is "one billion, two hundred forty-seven million, four hundred six thousand, seven hundred thirty-four".