1042405450 has 12 divisors (see below), whose sum is σ = 1938874230. Its totient is φ = 416962160.

The previous prime is 1042405381. The next prime is 1042405453. The reversal of 1042405450 is 545042401.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 601279441 + 441126009 = 24521^2 + 21003^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1042405453) 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, 10424005 + ... + 10424104.

Almost surely, 2^1042405450 is an apocalyptic number.

1042405450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1042405450 is a deficient number, since it is larger than the sum of its proper divisors (896468780).

1042405450 is a wasteful number, since it uses less digits than its factorization.

1042405450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20848121 (or 20848116 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1042405450 is about 32286.3043719779. The cubic root of 1042405450 is about 1013.9399255336.

Adding to 1042405450 its reverse (545042401), we get a palindrome (1587447851).

The spelling of 1042405450 in words is "one billion, forty-two million, four hundred five thousand, four hundred fifty".