1381253201 has 4 divisors (see below), whose sum is σ = 1441307712. Its totient is φ = 1321198692.

The previous prime is 1381253191. The next prime is 1381253219. The reversal of 1381253201 is 1023521831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1023521831 = 73 ⋅14020847.

It is a cyclic number.

It is not a de Polignac number, because 1381253201 - 2¹⁴ = 1381236817 is a prime.

It is a super-3 number, since 3×1381253201³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1381253101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30027221 + ... + 30027266.

It is an arithmetic number, because the mean of its divisors is an integer number (360326928).

Almost surely, 2^1381253201 is an apocalyptic number.

It is an amenable number.

1381253201 is a deficient number, since it is larger than the sum of its proper divisors (60054511).

1381253201 is an equidigital number, since it uses as much as digits as its factorization.

1381253201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60054510.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1381253201 is about 37165.2149327836. The cubic root of 1381253201 is about 1113.6731926343.

The spelling of 1381253201 in words is "one billion, three hundred eighty-one million, two hundred fifty-three thousand, two hundred one".