162891421 has 32 divisors (see below), whose sum is σ = 208067328. Its totient is φ = 123863040.

The previous prime is 162891409. The next prime is 162891431. The reversal of 162891421 is 124198261.

It is a happy number.

It is not a de Polignac number, because 162891421 - 2⁷ = 162891293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162891431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 843901 + ... + 844093.

It is an arithmetic number, because the mean of its divisors is an integer number (6502104).

Almost surely, 2^162891421 is an apocalyptic number.

162891421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

162891421 is a deficient number, since it is larger than the sum of its proper divisors (45175907).

162891421 is a wasteful number, since it uses less digits than its factorization.

162891421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421.

The product of its digits is 6912, while the sum is 34.

The square root of 162891421 is about 12762.8923446059. The cubic root of 162891421 is about 546.1342379936.

The spelling of 162891421 in words is "one hundred sixty-two million, eight hundred ninety-one thousand, four hundred twenty-one".