101601428 has 6 divisors (see below), whose sum is σ = 177802506. Its totient is φ = 50800712.

The previous prime is 101601427. The next prime is 101601449. The reversal of 101601428 is 824106101.

It can be written as a sum of positive squares in only one way, i.e., 101566084 + 35344 = 10078^2 + 188^2 .

It is a super-4 number, since 4×101601428⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101601427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12700175 + ... + 12700182.

It is an arithmetic number, because the mean of its divisors is an integer number (29633751).

Almost surely, 2^101601428 is an apocalyptic number.

It is an amenable number.

101601428 is a deficient number, since it is larger than the sum of its proper divisors (76201078).

101601428 is a wasteful number, since it uses less digits than its factorization.

101601428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25400361 (or 25400359 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 101601428 is about 10079.7533699987. The cubic root of 101601428 is about 466.6234969137.

Adding to 101601428 its reverse (824106101), we get a palindrome (925707529).

The spelling of 101601428 in words is "one hundred one million, six hundred one thousand, four hundred twenty-eight".