1042051399 has 2 divisors, whose sum is σ = 1042051400. Its totient is φ = 1042051398.

The previous prime is 1042051369. The next prime is 1042051477. The reversal of 1042051399 is 9931502401.

It is a weak prime.

It is an emirp because it is prime and its reverse (9931502401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1042051399 - 2¹⁵ = 1042018631 is a prime.

It is a super-2 number, since 2×1042051399² = 2171742236315714402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042051319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521025699 + 521025700.

It is an arithmetic number, because the mean of its divisors is an integer number (521025700).

Almost surely, 2^1042051399 is an apocalyptic number.

1042051399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042051399 is an equidigital number, since it uses as much as digits as its factorization.

1042051399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1042051399 is about 32280.8209158317. The cubic root of 1042051399 is about 1013.8251182881.

It can be divided in two parts, 104 and 2051399, that multiplied together give a triangular number (213345496 = T₂₀₆₅₆).

The spelling of 1042051399 in words is "one billion, forty-two million, fifty-one thousand, three hundred ninety-nine".