1381942152 has 24 divisors (see below), whose sum is σ = 3742760190. Its totient is φ = 460647360.

The previous prime is 1381942151. The next prime is 1381942157. The reversal of 1381942152 is 2512491831.

It can be written as a sum of positive squares in only one way, i.e., 825642756 + 556299396 = 28734^2 + 23586^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1381942152² = 3819528222948782208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1381942151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9596749 + ... + 9596892.

Almost surely, 2^1381942152 is an apocalyptic number.

1381942152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1381942152 is an abundant number, since it is smaller than the sum of its proper divisors (2360818038).

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

1381942152 is a wasteful number, since it uses less digits than its factorization.

1381942152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19193653 (or 19193646 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 1381942152 is about 37174.4825384295. The cubic root of 1381942152 is about 1113.8583237232.

The spelling of 1381942152 in words is "one billion, three hundred eighty-one million, nine hundred forty-two thousand, one hundred fifty-two".