25121400142 has 8 divisors (see below), whose sum is σ = 37777018536. Its totient is φ = 12529060632.

The previous prime is 25121400121. The next prime is 25121400163. The reversal of 25121400142 is 24100412152.

It is an interprime number because it is at equal distance from previous prime (25121400121) and next prime (25121400163).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15818728 + ... + 15820315.

It is an arithmetic number, because the mean of its divisors is an integer number (4722127317).

Almost surely, 2^25121400142 is an apocalyptic number.

25121400142 is a deficient number, since it is larger than the sum of its proper divisors (12655618394).

25121400142 is a wasteful number, since it uses less digits than its factorization.

25121400142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31639442.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 25121400142 its reverse (24100412152), we get a palindrome (49221812294).

The spelling of 25121400142 in words is "twenty-five billion, one hundred twenty-one million, four hundred thousand, one hundred forty-two".