1201142457 has 6 divisors (see below), whose sum is σ = 1734983562. Its totient is φ = 800761632.

The previous prime is 1201142441. The next prime is 1201142471. The reversal of 1201142457 is 7542411021.

1201142457 is a `hidden beast` number, since 1 + 201 + 1 + 4 + 2 + 457 = 666.

It can be written as a sum of positive squares in only one way, i.e., 663783696 + 537358761 = 25764^2 + 23181^2 .

It is not a de Polignac number, because 1201142457 - 2⁴ = 1201142441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201142457.

It is not an unprimeable number, because it can be changed into a prime (1201142407) 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, 66730128 + ... + 66730145.

It is an arithmetic number, because the mean of its divisors is an integer number (289163927).

Almost surely, 2^1201142457 is an apocalyptic number.

It is an amenable number.

1201142457 is a deficient number, since it is larger than the sum of its proper divisors (533841105).

1201142457 is a wasteful number, since it uses less digits than its factorization.

1201142457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133460279 (or 133460276 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1201142457 is about 34657.5021748539. The cubic root of 1201142457 is about 1062.9956960297.

Adding to 1201142457 its reverse (7542411021), we get a palindrome (8743553478).

The spelling of 1201142457 in words is "one billion, two hundred one million, one hundred forty-two thousand, four hundred fifty-seven".