1371721048 has 32 divisors (see below), whose sum is σ = 2589350400. Its totient is φ = 681243552.

The previous prime is 1371721009. The next prime is 1371721049. The reversal of 1371721048 is 8401271731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371721049) 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, 1319713 + ... + 1320751.

It is an arithmetic number, because the mean of its divisors is an integer number (80917200).

Almost surely, 2^1371721048 is an apocalyptic number.

It is an amenable number.

1371721048 is a deficient number, since it is larger than the sum of its proper divisors (1217629352).

1371721048 is a wasteful number, since it uses less digits than its factorization.

1371721048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999 (or 1995 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 1371721048 is about 37036.7526654268. The cubic root of 1371721048 is about 1111.1054236716.

Adding to 1371721048 its reverse (8401271731), we get a palindrome (9772992779).

The spelling of 1371721048 in words is "one billion, three hundred seventy-one million, seven hundred twenty-one thousand, forty-eight".