1142978407 has 2 divisors, whose sum is σ = 1142978408. Its totient is φ = 1142978406.

The previous prime is 1142978381. The next prime is 1142978429. The reversal of 1142978407 is 7048792411.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142978407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142978467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571489203 + 571489204.

It is an arithmetic number, because the mean of its divisors is an integer number (571489204).

Almost surely, 2^1142978407 is an apocalyptic number.

1142978407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142978407 is an equidigital number, since it uses as much as digits as its factorization.

1142978407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 1142978407 is about 33807.9636624272. The cubic root of 1142978407 is about 1045.5528943891.

The spelling of 1142978407 in words is "one billion, one hundred forty-two million, nine hundred seventy-eight thousand, four hundred seven".