1247971270 has 32 divisors (see below), whose sum is σ = 2764738368. Its totient is φ = 394962048.

The previous prime is 1247971229. The next prime is 1247971303. The reversal of 1247971270 is 721797421.

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, 684789 + ... + 686608.

It is an arithmetic number, because the mean of its divisors is an integer number (86398074).

Almost surely, 2^1247971270 is an apocalyptic number.

1247971270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1247971270 is an abundant number, since it is smaller than the sum of its proper divisors (1516767098).

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

1247971270 is a wasteful number, since it uses less digits than its factorization.

1247971270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371424.

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 1247971270 is about 35326.6368339812. The cubic root of 1247971270 is about 1076.6342606180.

The spelling of 1247971270 in words is "one billion, two hundred forty-seven million, nine hundred seventy-one thousand, two hundred seventy".