1264621142 has 8 divisors (see below), whose sum is σ = 1941046536. Its totient is φ = 617605632.

The previous prime is 1264621139. The next prime is 1264621147. The reversal of 1264621142 is 2411264621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264621147) 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, 7352363 + ... + 7352534.

It is an arithmetic number, because the mean of its divisors is an integer number (242630817).

Almost surely, 2^1264621142 is an apocalyptic number.

1264621142 is a deficient number, since it is larger than the sum of its proper divisors (676425394).

1264621142 is a wasteful number, since it uses less digits than its factorization.

1264621142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14704942.

The product of its digits is 4608, while the sum is 29.

The square root of 1264621142 is about 35561.5120882113. The cubic root of 1264621142 is about 1081.4011141797.

Adding to 1264621142 its reverse (2411264621), we get a palindrome (3675885763).

The spelling of 1264621142 in words is "one billion, two hundred sixty-four million, six hundred twenty-one thousand, one hundred forty-two".