1381725501 has 8 divisors (see below), whose sum is σ = 1984016160. Its totient is φ = 850292592.

The previous prime is 1381725497. The next prime is 1381725517. The reversal of 1381725501 is 1055271831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1381725501 - 2² = 1381725497 is a prime.

It is a super-2 number, since 2×1381725501² = 3818330720227402002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381725001) 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, 17714391 + ... + 17714468.

It is an arithmetic number, because the mean of its divisors is an integer number (248002020).

Almost surely, 2^1381725501 is an apocalyptic number.

It is an amenable number.

1381725501 is a deficient number, since it is larger than the sum of its proper divisors (602290659).

1381725501 is a wasteful number, since it uses less digits than its factorization.

1381725501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35428875.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 1381725501 is about 37171.5684495556. The cubic root of 1381725501 is about 1113.8001131025.

The spelling of 1381725501 in words is "one billion, three hundred eighty-one million, seven hundred twenty-five thousand, five hundred one".