1572640142 has 4 divisors (see below), whose sum is σ = 2358960216. Its totient is φ = 786320070.

The previous prime is 1572640117. The next prime is 1572640171. The reversal of 1572640142 is 2410462751.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×1572640142³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1572640099 and 1572640108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393160034 + ... + 393160037.

It is an arithmetic number, because the mean of its divisors is an integer number (589740054).

Almost surely, 2^1572640142 is an apocalyptic number.

1572640142 is a deficient number, since it is larger than the sum of its proper divisors (786320074).

1572640142 is an equidigital number, since it uses as much as digits as its factorization.

1572640142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786320073.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 1572640142 is about 39656.5271046268. The cubic root of 1572640142 is about 1162.9020041357.

The spelling of 1572640142 in words is "one billion, five hundred seventy-two million, six hundred forty thousand, one hundred forty-two".