1601426531 has 4 divisors (see below), whose sum is σ = 1602670200. Its totient is φ = 1600182864.

The previous prime is 1601426501. The next prime is 1601426539. The reversal of 1601426531 is 1356241061.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1601426531 - 2⁶ = 1601426467 is a prime.

It is a super-2 number, since 2×1601426531² = 5129133868381387922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1601426494 and 1601426503.

It is not an unprimeable number, because it can be changed into a prime (1601426539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619901 + ... + 622478.

It is an arithmetic number, because the mean of its divisors is an integer number (400667550).

Almost surely, 2^1601426531 is an apocalyptic number.

1601426531 is a deficient number, since it is larger than the sum of its proper divisors (1243669).

1601426531 is a wasteful number, since it uses less digits than its factorization.

1601426531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243668.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1601426531 is about 40017.8276646797. The cubic root of 1601426531 is about 1169.9545921940.

Adding to 1601426531 its reverse (1356241061), we get a palindrome (2957667592).

The spelling of 1601426531 in words is "one billion, six hundred one million, four hundred twenty-six thousand, five hundred thirty-one".