1142978401 has 4 divisors (see below), whose sum is σ = 1179848704. Its totient is φ = 1106108100.

The previous prime is 1142978381. The next prime is 1142978407. The reversal of 1142978401 is 1048792411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1142978401 - 2²¹ = 1140881249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142978407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18435105 + ... + 18435166.

It is an arithmetic number, because the mean of its divisors is an integer number (294962176).

Almost surely, 2^1142978401 is an apocalyptic number.

It is an amenable number.

1142978401 is a deficient number, since it is larger than the sum of its proper divisors (36870303).

1142978401 is an equidigital number, since it uses as much as digits as its factorization.

1142978401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36870302.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 1142978401 is about 33807.9635736907. The cubic root of 1142978401 is about 1045.5528925596.

The spelling of 1142978401 in words is "one billion, one hundred forty-two million, nine hundred seventy-eight thousand, four hundred one".