2042120451 has 16 divisors (see below), whose sum is σ = 3113510400. Its totient is φ = 1166285568.

The previous prime is 2042120413. The next prime is 2042120459. The reversal of 2042120451 is 1540212402.

It is not a de Polignac number, because 2042120451 - 2⁶ = 2042120387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2042120459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13930 + ... + 65408.

It is an arithmetic number, because the mean of its divisors is an integer number (194594400).

Almost surely, 2^2042120451 is an apocalyptic number.

2042120451 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2042120451 is a deficient number, since it is larger than the sum of its proper divisors (1071389949).

2042120451 is a wasteful number, since it uses less digits than its factorization.

2042120451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53378.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2042120451 is about 45189.8268529544. The cubic root of 2042120451 is about 1268.7044160510.

Adding to 2042120451 its reverse (1540212402), we get a palindrome (3582332853).

The spelling of 2042120451 in words is "two billion, forty-two million, one hundred twenty thousand, four hundred fifty-one".