1142400397 has 2 divisors, whose sum is σ = 1142400398. Its totient is φ = 1142400396.

The previous prime is 1142400383. The next prime is 1142400431. The reversal of 1142400397 is 7930042411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 991872036 + 150528361 = 31494^2 + 12269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142400397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142400367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571200198 + 571200199.

It is an arithmetic number, because the mean of its divisors is an integer number (571200199).

Almost surely, 2^1142400397 is an apocalyptic number.

It is an amenable number.

1142400397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142400397 is an equidigital number, since it uses as much as digits as its factorization.

1142400397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1142400397 is about 33799.4141517275. The cubic root of 1142400397 is about 1045.3766175304.

The spelling of 1142400397 in words is "one billion, one hundred forty-two million, four hundred thousand, three hundred ninety-seven".