1301135725 has 18 divisors (see below), whose sum is σ = 1630569930. Its totient is φ = 1029866400.

The previous prime is 1301135723. The next prime is 1301135741. The reversal of 1301135725 is 5275311031.

It can be written as a sum of positive squares in 3 ways, for example, as 154703844 + 1146431881 = 12438^2 + 33859^2 .

It is not a de Polignac number, because 1301135725 - 2¹ = 1301135723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1301135693 and 1301135702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301135723) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1882630 + ... + 1883320.

Almost surely, 2^1301135725 is an apocalyptic number.

It is an amenable number.

1301135725 is a deficient number, since it is larger than the sum of its proper divisors (329434205).

1301135725 is an frugal number, since it uses more digits than its factorization.

1301135725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 1301135725 is about 36071.2589882860. The cubic root of 1301135725 is about 1091.7106167519.

Adding to 1301135725 its reverse (5275311031), we get a palindrome (6576446756).

It can be divided in two parts, 1301 and 135725, that added together give a triangular number (137026 = T₅₂₃).

The spelling of 1301135725 in words is "one billion, three hundred one million, one hundred thirty-five thousand, seven hundred twenty-five".